Chrissy, read this too...
http://www.blackberryforums.com/gene...lackberry.html
The biggest battery drain is programs, not closed, running in the background. Press ALT and ESCAPE to scroll through the programs running on your BB. You will always have the home screen, phone, browser, messages and BB Messenger if you have that loaded. Games and browser pages that are actively updating can run down your battery, close or exit out of them. Pressing the red END key does not close an app. Click to the menu in the app and choose close or exit.
Topping off your charge does not hurt. However since your BB is relatively new, try letting it drain 3-4 times in a row to about 15% charge, and letting it charge fully to 100%.