Another way to get good battery life is to turn the display brightness down as much as you can stand it. I usually only need it about %25 in my home, although outside it pretty much needs 100%. But if I am inside all day and have it set low or to Auto, it really saves the battery. I haven't used it a lot today, other than some browsing, updating Market apps, and taking some pics of my daughter's soccer game, but after 12 hours I am only down to 80%! If you look at the stats of what is using up your battery, you will almost always see "Display" listed #1.