One thing that has helped me is to record my scores as well as notes regarding certain holes after every round. I believe that has helped me gain an understanding regarding how to play certain holes. As well as which holes I seem to blow up on. Now I have decided not pull the driver on a couple holes, aim well right/left on a couple (left is dead while a par can be made from the right rough) but primarily to keep the ball below the hole on about 6 holes leads to an easy par.

Have you tried to determine what the biggest problem is? certain holes, hitting it ob, just a series of poor shots, Tee shots getting you in trouble etc, poor chipping, length of the holes, the par 3's, 4's 5's ..........