New Phone

I know I'm a little late to the Android party, but I picked up my new phone yesterday, HTC Hero. My T-Mobile contract came up, and I have made the jump from Balckberry.
So far...I like it.
I will follow-up after I completely figure it out, get the apps that I want loaded, and test out DoubleTwist.

Any suggestions on what I can do, should try, make sure to not do?