If you are serious about becoming a better rider/racer the best thing you can do is take lessons from a pro. They can see all the bad habits you have developed and give you drills and advice to correct them. I took lessons from Jim Gibson several years ago and it made a huge difference i my riding, (as long as I practiced what he taught me). One day he had me doing nothing but braking drills in the parking lot, didn't even look at the track all day. Listen to what the pro says and practice it until you can do it in your sleep, then practice it again.