Shortening the pushaway step (if it is too long), is a great way to better timing.
The length of the pushaway step should vary slightly, depending on the number of steps taken. In a 5-step, the length of the key (pushaway step) should be slightly shorter than the key step taken in a 4-step approach. If the key step is too short, especially with a 4-step, timing problems can also occur because if taken TOO short, the upper body will end up chasing the ball. In short (no pun intended) a good rule of thumb to follow is to never extend the key step past the distance of the ball placement during your pushaway/hinge. Clifton is right though. Many timing problems result from taking this step much too long.