Welcome to Android. Battery life is never as good as you will want.
However one other thing to remember is the AMOLED screen uses much more power for bright/white pixels and zero power for black. So use dark backgrounds and colors more than a white background.
Try using Google Black (
Black Google Mobile - Battery Saving Search). If you read a lot, set the reading App to white text on black.
Not necessary, but it does make a difference.