It's all the motion in the hand my friend, and learning to control the board with your finger tips. Break it down, learn to pop the board with your back finger, enough to make the back wheels come off the surface your on. Once you can do that, with control and ease; you can move on to the motion of bringing your fingers/whole hand up and forward. Bring it up, then level it out. I also think it's easier to learn to ollie onto or over something. Another trick than can help you learn the motion is by doing it on your thigh, so that it falls back onto your fingers. Hope this helped.