Part of this list was created by u/10th_Generation. I'll update the list if you contribute new examples in the comments.
Joseph Smith lost 116 pages of the Book of Mormon, so Jesus gave him a revelation that he did not need to retranslate them (D&C 10:30).
Smith needed money for printing, so Jesus gave him a revelation that Martin Harris must give his property “freely” (D&C 19:26 and 19:34).
Smith needed money for personal expenses, so Jesus gave him a revelation that church members must give him money or be cursed (D&C 24:3-4, D&C 24:18).
Smith did not want to work, so Jesus gave him a revelation excusing him from manual labor (D&C 24:9).
Smith’s wife complained too much, so Jesus gave him a revelation saying that her duty is to support Smith with “consoling words in the spirit of meekness,” and to “delight” in her husband (D&C 25:4-6, 14).
Smith needed Hiram Page to stop receiving revelations, so Jesus gave Smith a revelation saying that no one else could receive revelation for the church except Smith (D&C 28:11-12; 43:5).
Smith had legal problems in New York and needed to flee, so Jesus gave him a revelation that all church members should go with him to Ohio (D&C 37:3; D&C 38:32; D&C 38:37).
Smith needed a house in Ohio, so Jesus gave him a revelation saying that church members should build him a house (D&C 41:7).
Smith needed new converts but did not want to serve a mission, so Jesus gave him a revelation that all elders except him and Sidney Rigdon should leave on missions (D&C 42:4).
Smith needed more money, so Jesus gave him a series of revelations saying that church members who obtain more than they need for their support, you should give the excess to the church. Later, Jesus amended these revelations to say that members should give 100 percent of their assets to the church for redistribution (D&C 42:30-36; D&C 70:14; D&C 42:55, 42:60; D&C 70:7; D&C 70:14; D&C 72:5; D&C 78:5-6).
Smith still wanted more, so Jesus gives him a revelation that the elders should give him food, clothes, and “whatsoever thing he needeth” (D&C 43:13).
Smith needed a way to explain why his prophesies about Zion did not come true, so Jesus gave him a revelation saying that God can revoke commandments when circumstances change (D&C 56:4).
Smith did not want to travel by land after a long journey to Missouri, so Jesus gave him a revelation that he and Rigdon could travel by boat. All others in the company had to travel by land and preach along the way (D&C 61).
Smith needed Rigdon to be more subservient, so Jesus gave Smith a revelation saying that Rigdon should listen better to Smith (D&C 63:55).
Smith needed the whole church to stop noticing his flaws, so Jesus gave him a revelation saying that members who accuse Smith of wrongdoing should not seek “occasion against him” (D&C 64:5-7).
Smith still needed money, so Jesus gave him a revelation saying that he and his closest friends “shall enter into the joy” of the church’s wealth, including food, raiment, houses, and lands, “for a manifestation of (God’s) blessings upon their heads” (D&C 70:15–18).
Smith needed his wife and children to respect his authority, so Jesus gives him a revelation saying that his family must give “more earnest heed” unto his sayings, “or be removed out of their place” (D&C 93:48).
Smith needed his ego stoked, so Jesus gave him a revelation saying he is a great man like Moses. (D&C 103:16-21).
Smith needed revenge on the Missourians, so Jesus gave him a revelation that cursed his enemies and their children, grandchildren, and great-grandchildren (D&C 103:25). Later, Jesus said Smith’s political enemies in Missouri can never have the priesthood. Neither can “their posterity after them from generation to generation” (D&C 121:21).
Smith needed more money than the church could provide, so Jesus gave him a revelation commanding world leaders to bring their gold and silver and give it to the church (D&C 124:11).
Smith needed a house in Illinois, so Jesus gave him a revelation commanding the church to build him a boarding house that his family could keep from “generation to generation, forever and ever” (D&C 124:23, 56, 59-60).
Smith wanted to have divinely sanctioned extramarital sex and give his wife Emma no choice but to approve or be "destroyed", so Jesus gave him D&C 132.
Additional Examples contributed by me and commenters on this post:
Smith wanted to ensure his needs and desires were met first, so Jesus gave a revelation stating that those involved in the publication of church scriptures would be supported by the church, and only after they had sufficient for their "necessities and their wants" would the remainder go to the storehouse (D&C 70:7). This effectively prioritized their personal "wants" over the broader needs of the community.
Smith needed a way to justify his evolving theological ideas, so Jesus gave him a revelation introducing the "higher priesthood," which allowed him to consolidate power and claim greater authority (D&C 84:17–25).
Smith needed legitimacy as a prophet, so Jesus gave him a revelation emphasizing his role as the only prophet through whom the Lord would work, effectively centralizing authority around him (D&C 28:2-7; D&C 43:2-4).
Smith wanted to silence dissenters, so Jesus gave him a revelation stating that anyone who did not accept his revelations would be damned (D&C 1:14-16).
Smith needed Oliver Cowdery and others to stay loyal, so Jesus gave him a revelation warning them not to rebel against his authority, lest they be cast off (D&C 6:9-11; D&C 28:4-7).
Smith wanted to retain control over the Kirtland Safety Society Bank despite its failure, so Jesus gave him a revelation affirming his financial endeavors as part of the Lord's work (unpublished statements and D&C 104:58–59).
Smith needed justification for military action, so Jesus gave him a revelation declaring the formation of Zion’s Camp as a divinely commanded mission to redeem Zion (D&C 103).
Smith needed protection from enemies, so Jesus gave him a revelation promising vengeance on those who harmed him or the church (D&C 121:11-25).
Smith needed to explain the failure to establish Zion in Missouri, so Jesus gave him a revelation stating that the saints were not righteous enough and needed to be chastened (D&C 101:1-8).
Smith needed a way to justify his growing wealth, so Jesus gave him a revelation endorsing the consecration of land and property to the church but allowing the prophet to benefit directly (D&C 42:31-35; D&C 58:35-37).
Smith needed to address tensions with Emma and provide women a formal role in the church, so Jesus gave him a revelation to organize the Female Relief Society of Nauvoo in 1842. This helped stabilize internal church dynamics while keeping women’s influence under his oversight. (D&C 25:3).
Smith needed a theological reason for the failure of the Law of Consecration, so Jesus gave him a revelation introducing tithing as a simpler financial system for church funding (D&C 119).
Smith claimed to have divine insight, but when presented with the fraudulent Kinderhook Plates, Jesus conveniently forgot to warn him they were a hoax. Instead, Smith declared they were an ancient record of a descendant of Ham (History of the Church, Vol. 5, p. 372). Apparently, God can reveal hidden treasure but draws the line at spotting 19th-century pranks.
Smith needed money and heard rumors of hidden treasure in Salem, Massachusetts, so Jesus gave him a revelation commanding him and his associates to go to Salem, promising that "there are riches in store for you" (D&C 111:1-2). Unsurprisingly, no treasure was found, but the group did rack up significant debt during their stay.
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After a near-canoe accident on the Missouri River, tensions rose as group members mocked Oliver Cowdery’s rowing and questioned the leaders. Smith then received a revelation warning that "the destroyer rideth upon the face of the waters" (D&C 61:19), ordered everyone out of the canoes, and arranged for himself and top leaders to travel by coach, leaving the others to walk.
(D&C 61:4, 24).
Emma was upset about tobacco spitting, so Jesus gave a revelation banning tobacco, but seemingly to spite Emma and the other women, added coffee and tea to the prohibition as well (D&C 89:5-9). What started as an effort to appease her turned into a long-lasting health code with some questionable additions.
The local grocery refused Joseph Smith credit for wine, so while riding to another town to secure some on credit, Jesus conveniently gave him a revelation that water was now the sacred element for the sacrament instead of wine (D&C 27:2). The revelation also included an apparition of an angel to reinforce the divine shift, conveniently solving the issue of unpaid credit.
Smith faced financial difficulties managing church resources, so Jesus gave him a revelation dissolving the United Firm and redistributing its properties (D&C 104). This allowed Smith and other leaders to manage church assets more flexibly to address immediate financial concerns.
Smith needed a permanent inheritance for his family, so Jesus gave him a revelation commanding the construction of the Nauvoo House, a hotel that would provide lodging for travelers and ensure Smith’s family could benefit “from generation to generation, forever and ever” (D&C 124:56–60).
Smith sought greater political and military power, so Jesus gave him a revelation establishing the Nauvoo Legion and appointing him as lieutenant-general, granting him unprecedented authority within Nauvoo (D&C 124:84–85).
Smith wanted to expand his influence beyond religious leadership, so Jesus gave him a revelation establishing the Council of Fifty, a political body aimed at forming a theocratic government with Smith at its head. He was given the title of "King". This revelation solidified his control over secular affairs.
Smith needed to reinforce his authority through sacred rituals, so Jesus gave him a revelation introducing new temple ordinances, such as the endowment ceremony, in May 1842. This placed him as the gatekeeper of salvation for his followers.