Here's are 3 tips:
1. Before playing in any match, focus on progressive straight in shots (further and further away).
If you know which side the OB is off (left or right of pocket), you can make manual adjustments when your brain says its perfect and before pulling the trigger. This little trick can improve your shooting success by 20-30%.
2. For dialing in your positioning skills, do some speed control exercises (cross side, once and a half, cross side lag; long table, once and a half, and standard lag).
3. And, of course, the standard - learn from your mistakes (THOROUGHLY THINK IT OUT). On any failed shot, figure out why, and then how you should have played it.