[f1n3st]

First thing i would recommend to do is tune your evo so that the battery doesn't drain fast. Change the settings for any application that would connect to the internet automatically like facebook, twitter, friendstream, email, location settings etc.. alot of the applications have this option so just disable it or instead of making it refresh 15-30 minutes change it to refresh 2-3 hours or just turn it off completely if you don't use it that much at all.

another thing is to change your brightness, the brightness setting in the stock rom is set high so there will be strain on your eyes and your battery will get sucked away from it. to change it just hit the menu button and go to settings, now go to sound and display, scroll all the way down to brightness and set it to what suits you best, i have it set to right in the middle of the check box and letter A of Automatic Brightness.

you should also go download the program taskpanel from the market, it lets you turn off programs running in the background, it also has a widget for a one touch button so its easy and simple. any task app would be fine i just like taskpanel because of the widget feature.