If you download a widget app from the ,market,then put wifi,GPS,data,sync,Bluetooth,aiplanemode,and volume control on one of your pages to make it easy to get at them. Turn off everything when not in use. Also,when you turn your phone on, turn airplane mode on for 30 seconds, then turn off. This fixes the "time without signal " bug that the "V" has. All these things plus making sure you don't have any apps that are set to auto update. You can check your apps by going to the market and going to the "my app" section.
I hope this was of some help with the battery drain issue.