Facebook semi-virgin...clue me in

OK, I've had a facebook account for a few months...my 20th HS reunion info is being shared that way, so I went ahead and bit the bullet and signed up.

I've added a few friends...added some photos...

BUT...

what is there to do LOL?
found the flair maker...
I've heard about Pet Society but I'm clueless...
tell me what you like to do there...I feel like I'm treading water!

I signed up for it last summer. Played with flair for a month and got bored. I guess it just doesn't entertain me. lol I hear there are a ton of applications to play though.