Help Help me save my battery!

[cnnmngrl]

Please help me to conserve my phone's terrible battery life!
How do I set my phone to low battery usage without limiting my connectivity? Basically, I would like my Gmail to come through all the time and to not have to put any internet setting to 'On' before using the Broswer or Market.
Also, I don't think that I am managing to close my applications properly. I just press the 'back' button to get out of them, is this making my phone use more battery?
Thanks guys

 

[cnnmngrl]

Just want to add that I am using Advaced Task Killer, however when I ask it to kill running apps, still certain apps appear when I hold in the middle button. Does this mean they are still running and if so how can I stop the infernal things?
I HATE THIS PHOOOOOOOOONE.

 

[pa3xxiah]

When you press the middle button,it also displays recently opened apps. So even when the apps are killed, you'd see it there.
Read this blog post, I hope this helps:
Charging the Xperia X10 Mini Pro | Digital Culture PH