Rule #1: A small preview image may go outside of a cut, but no more than one or two -- all other images should be under a cut. You may text-link to size variations outside of a cut, inside of a cut, or at your graphics/personal journal. Doesn't matter.
Rule #2: USE THE TAGS. (Don't worry if your fandom specific tag is not there, we will add it.)
Rule #3: No linking to locked posts or posts that will eventually be locked. These will be deleted. [On that same note, do not disable commenting in the case that a mod needs to contact you for a post-related reason.]
Rule #4: If you're not posting desktop wallpaper, device wallpaper, wallpaper recs or discussion, then you probably shouldn't post it. (In other words, no advertisements please.)
Rule #5: Please include fandom, subject, pairing, size, etc. information in your post so that it can be properly tagged by admin if the correct tags have not been created yet.