1. Tell you why I friended you (assuming I have).
2. Associate you with something - fandom, a song, a colour, a photo, etc.
3. Tell you something I like about you.
4. Tell you a memory I have of you.
5. Associate you with a character/pairing. (presumably different than 2)
6. Ask something I've always wanted to know about you.
7. Tell you my favorite user pic of yours.
8. In return, you may post this in your LJ.