Headlight problems

I know that there is a way to do this, but I guess I am not that inclined to figure it out...but how can I readjust my headlights? They point too far upwards, when I turn my brights on, it hits the tops of most trees and misses the most important part of where I need them to hit: the road! Also, people will flash me, thinking my brights are on, which they aren't, it's just due to where they are aimed.

Thanks!

this is the easiest to do it yourself: http://news.carjunky.com/how_stuff_works/how-to-align-your-headlights-abc449.shtml

Or if you have a big budjet and need an excuse to buy more tools you can try this one: http://www.youtube.com/watch?v=ejn2aCO3PNM&feature=related

Or you can swing buy a body shop/dealer/garage and have them done for a nominal fee.