Things I am currently obsessed with:
-Organic foods and nutritional supplements
-Bonsai

Things I have become obsessed with--or at least pretty gung-ho about--in the past (and then kind of lost interest in after a few days or weeks):
-Digital scrapbooking
-the "Grocery Game"
-Knitting
-the Atkins diet
-the South Beach diet
-"Sqaure Foot" gardening
-Guinea pigs (I still have them and like them, but am not reading about them every day)
-Taking vitamins (this one comes and goes)
-Exercising (ditto)
-Trading tapes of live Phish shows
-Drawing (I wasn't very good anyway)
-Meditation (would like to do it but don't reliably make the time)
-Yoga (ditto)
-Pilates (hurts my butt too much, though I like it in theory)
-Karate (I may return to this)
-Myspace (still use it, but the novelty wore off pretty quickly)

I think I have inherited this problem from my father. He has become obsessed and then subsequently lost interest in many things over the years, including food dehydration, home juicing, playing the piano and guitar, home picture matting and framing, photography, and stock trading.

I draw the line at buying ridiculous infomercial products. I can take solace in at least that much.