1. Disable autotrotate

2. Disable auto sync

3. keep the leas amount of apps/icons on your home screen (the more apps on home screen the more memory required to run them)

4. Close apps you are not using

5. disable wifi if you are not connected to a hotspot (searching for wifi uses more battery than being connected to one)

6. Consider getting and upgraded battery

These will help your battery alot

My mini right now has been on battery for 14 hours and 56 min with 50% battery left, wifi been on whole time and i've been making calls and texting (I also have an upgraded battery)

 

by meaning an upgraded battery u mean something more than the 1200 mAH battery?

 

I think u need the ato sync enable for android market

 

You can enable auto sync when you need it, you don't have to leave it on all the time

Yes i have a battery bigger than 1200 mAh. My battery is 1500 mAh

Here is a reply i posted in another battery thread, these are all the upgraded batteries that i know of