[Antmeister]

Here's the ones that I find I use the most:

For recipes:
Epicurious and AllRecipes

For find a good place to eat or for finding entertainment:
Yelp
Local Books
Movies Now

For home entertainment:
instantwatcher (to find the newest and hottest movies/shows on Netflix and add it to your instant watch queue)
Scrabble (to defeat the spouse)
Trivia Wars (to defeat the spouse again)

And when I have trouble relaxing and/or sleeping:
BrainBaths
Pzizz relax and Pzizz sleep (I swear by these two)

For getting through the day at work:
ooTunes (AM/FM radio)
Slacker (Customized Music)
RSS Player (for listening to podcasts)
RSS Feed (for catching up on any blogs/sites I am subscribed to)
Facebook
TWIT (Tech shows)

And for trying to get into better shape:
Nutrition (I like this one a lot. It shows you the calorie count of the foods you eat at most Fast Food places if you didn't make your meals.)
iFitness (not using it much now since I am in the middle of the 6 week course for EA Sports Active, but will use again when it is over.)
PushupFu and CrunchFu (bought at the beginning of the year and same deal as above).