If you haven't done so already, read through this sticky:
http://forum.ppcgeeks.com/showthread.php?t=779
lots of good starter tips on there. Learn how the phone works first. Then figure out what you would like to see it do. (It's alot different that the Q was)
Then, I would highly recommend updating your ROM. WM5 was OK in it's day, but not as good as some of the other ROM's that have been put together here in the past. I've been running Verizonguy's WM6 for a couple years without any troubles.
These days, there are "kitchens" that alow you to put together a ROM with the features you want. MUCH better than what was originally on the phone!!!!!
Good Luck!
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The Ark: built by an Amatuer...
The Titanic: built by Professionals
VZW 6700 w/ Verizonguy's WM6:A4 =D>, Phoenix's 1.41 radio =D>, iLauncher 3.1, Mohairsoft's Calendar+ 2.5.2, HTC Audio Manager, Logitech F-0399a Bluetooth earpiece.