Reply to this journal and I'll...

a) tell you why I friended you
b) associate you with something - a song, a color, a photo, a mental image, etc.
c) tell you something I like about you
d) tell you a memory I have of you
e) ask something I've always wanted to know about you
f) give you one piece of advice that might be useful to you
g) in return, you must post this in your Journal