Also, LJ user links (what happens when you do the < lj user = name > html thing) look funky on people's tumblr dashboards after being mirrored. This is absolutely NOT a requirement, but you may want to refrain from using those links to avoid the formatting weirdness—regular text links look just fine in both places.
As always, you can check out all the info about posting on our profile page, and if you have any questions about anything, hop over to the Page a Mod post, or you can message either stars (LJ/Tumblr) or myself (LJ/Tumblr) with any questions.
PS - Don't forget our community requests challenge is still going on! If you haven't already, check out the list of requests and share recs to help your fellow comm members find amazing fic this month!