ugh. No offense to you, since you probably just did a quick google search, but I really hate those 20 tips.
That article was thrown around quite a bit when the Evo was released, and through my own controlled tests, I determined that most of those tips don't do squat, and it gave people the impression that the phone had to be completely nerfed to work.
In other words, that article helped the Evo earn a crappy reputation for battery life.
Tips 1, 4, 5, 6, 7, 8, 10, 11, 13, 15, 17, 18, 19, 20 either don't make much difference, or they are flat-out wrong.
That's 14 out of 20 tips that don't help.