Battery Questions

[jay1200]

Hey guys, i recently purchased a XV6900 and i am noticing the battery life is short lived. Is there anything i can do to save my battery. i am barely using the phone and its draining fast. are there settings i am missing? my email is set to download every 5 min. i notice when i click on the top right button it shows multiple programs running. how can i completely make sure they are closing out when i click the x button and what other ideas do you have to save the battery. Please help. I like the phone but wont keep it if the battery drains that fast on a normal basis.