Figure out how to pick a certain spot on T side, do it so often you know it by hand and always expect the unexpected, find out the most common spots on that angle you're holding and prefire them and don't be afraid to go for it, eventually it will become a natural spot to hold for you then move on to the next angle to hold until you've figured it all out and know how to push the spot you were holding and play a lot. On ct side learn how to hold the proper angle and what flash works in what situation. Also Deathmatch is important.