Here is a tip that I wanted to give you guys that has always helped my game. It has to do with going with smarter plays in order to build your confidence in the long run. For example, if you are teeing it up on hole #1, if it's under 400 yards, keep the driver in the bag. Go with a 3 wood or if you have really good distance a long iron. Reason being is because it's more important to hit the fairway then it is to get an extra 20 yards. Not only do you leave yourself an easier second shot, you feel good about your first shot, leading to a more confident round.
And remember it's not just about the tee off, but many of these situations will arise on the course where the more aggressive option isn't worth it. Play smarter shots and watch as your frustration, and your golf score, goes down.