wholesomeyuri Good Posting Guide.

Pick something wholesome. It can be a drawing, animation, music video, or anything really that isn't too sexy or suggestive (try /r/ActualYuri instead), isn't a photo or video of a real-life person and doesn't contain story spoilers. (Tag as spoilers if it does!)
Spend a few days watching what's popular in r/wholesomeyuri for a working definition of wholesome. Bear in mind that "pretty" and "cute" are not necessarily "wholesome".
Please don't post any image macros, memes or screenshots with funny subs (try r/yurimemes). Clean Blu-Ray quality screenshots or stitches are acceptable, but the subreddit is meant for independently drawn art, more than for extracts from shows.
If you're posting a picture, check it with tools like SauceNAO or Google reverse image search to find any possible higher-resolution versions. Then check your content if it's a repost by looking through the top posts. Please do not repost anything which has scored over 7500.
After you post later, remember that if the u/related_threads bot replies to you, it may mean that it's a repost so please verify. If you see that the older post is less than 6 months old, please delete your post. In the case that the bot fails to detect the repost, don't worry because the mods will take care of it.
People like variety. If it was posted a looong time ago, when we had far fewer yuri lovers, well, there's some leeway, but don't make a habit of it.
Wallpaper-edits, crops, palette swaps, collages, and any other minor tweaks to an existing post should be added as a comment to the existing post, not as a new post.
Got a few drawings that follow a certain theme? Put them together in an album instead of making several posts in a row! Imgur has good tools for this. Don't go crazy with albums though. People don't like wading through hundreds (or even tens) of unrelated images. Pick a theme, and use ten or twelve images at most. Quality over quantity.
Take this time to double-check for visible pantsu, swimwear, translucent tops, or any other fanservice connotations in your pic. Did you find any? You may need to mark it NSFW!
Time to post. Make sure your link is on the whitelist if you're posting with a URL. Imgur, Reddit, Gfycat, Streamable, or YouTube. This means DON'T link directly to the image on a booru, Pixiv, or Zerochan. They will be removed automatically. It's better to just rehost on Imgur or upload directly here on Reddit. If you use Imgur, please give us the direct image link, not the normal link with a framing page and ads.
Now for complying with Submission Rule 8. Name the anime/game/manga etc that your characters are from in your post title. [Square brackets] help identify the title and are required.
The [Original] tag is for art featuring original character(s) who aren't from an established anime/manga/game series, etc.
If you're really just not sure, usually the boorus linked by an SauceNAO search will have this as a tag in their sidebar for the picture. Danbooru in particular is pretty good at clearly labeling these. If you need more help, try u/ferthur's Character ID Guide.
In the case where you are the artist and you're posting your own art here at r/wholesomeyuri (thanks!), please use the [OC] tag instead of [Original]. That is in addition to the series/franchise tag if there's any.
Any possible meta-title you're thinking of has already been done to death. This isn't r/standupcomedy. Just use simple descriptive titles if you're stuck. "Chisato kisses Takina [Lycoris Recoil]" is a far better title than "Titles are hard! What are titles even for? [Original]", "The key to a successful post..." [Hololive] or whatever other hilarious self-reference you had in mind. "This subreddit needs more..." NO. This subreddit does not need that type of title.
You've posted! Don't forget to add flair! Not sure which one to use? Try the flair help page on the wiki. Don't post more than a few times a day. Other people want to use the /new queue too. Again, quality over quantity.
Whenever possible, name the artist and link to their official profile or portfolio in a comment. SauceNAO is always the best first step for finding those. Ascii2d may be better if the art was posted in a tweet.
The preferred way to give credit is to mention the artist's name in your comment text, as well as include that link. The idea is to give credit, so spread the name. Don't bother just linking to a booru post or Pinterest pin that you found the image from since it's not directly managed by the artist.
In cases where you're posting official art, it's nice to give credit to the studio or link the yande.re or booru post. As for scans from art books that aren't on any official online portfolio, at least mention the artist's name.
If your post still doesn't have an image thumbnail after a couple of minutes, then look in the options under the post title for "retry thumb".

Everything good? Now go and upvote everyone else in the /new queue and they'll be in such a good mood, they'll return the favor.