Better players suffer from hooks and pushes caused by getting stuck inside on the downswing, creating an inside out swing that will either push out to the right or hook as the swing path turns your arms over
Advanced players who need some help with the top of their backswing or sequence should try this drill, take your club to the top of your backswing and stop for a second before you start your downswing
Swing two clubs parallel to each other back and forth trying to keep the clubs from clanging together, this works your timing as well as coordinates your body with your arms