Part of being on LJ is inevitably gaining a number of LJ buddies. Unfortunately, as time wears on, it's easy to forget where all of them came from. Post this in your journal and have your friends respond with how they recall first meeting you. If you've met me IRL after LJ, bonus points for telling me how we found each other in both places.
[Pedant point: I think it's implicit in the above that you should comment here, not just post it in your own journal.]