Help me create a workout Ipod playslist!

So I bought my first Ipod today. I started going to the gym and I wanted something to listen to while I was exercising. So what is your workout songs? I know you have some. I bought "All the Single Ladies" Beyonce'. That will sure get your heart pumping! I intend on loading my Black Eyed Peas CD as well. I need more...come on I am counting on you guys!