-upload to your own server.
-edit unless otherwise specified.
-steal/claim as your own.
Crediting is encouraged to spread the word about this community. Of course, the world won't end if you don't credit, but it's appreciated!
Hotlinking is not something looked well upon. For those of you who don't know, hotlinking is using the URL of an image that's posted and re-posting it; this eats up the bandwidth of the person you took the URL from. For this reason, it's generally suggested that you get your own account on an image hosting site- try Photobucket, ImageShack, or something like them to host images you've saved.
Coming soon! If you have a question, comment to this post!