Robert,
Thanks for asking. I don't know how much assistance I can offer. I think we all suffer from that. Even Tiger refers to Ranger Rick! I'm not much of a psychologist, but I do know that simulating practice as close to real time will help and practicing shots that make you better will help too. For example, when you practice putting practice lag putting and from 3 feet. Don't worry so much about the in-between. When you practice lag putting, try to get them within 3 feet. When you start knocking down those 3-footers, you'll feel better. Same thing goes for chipping when you miss the green. Work on getting those shots within 3 feet.

That will knock strokes off your game quicker than anything. Greg or one of the other pros or even Ian might be able to add more or correct what I've added - but this is where I'd start.

If you can hit 300+ on the practice range, swing at 80% on the first tee. This will help your nerves and you'll hit the fairway more often. You could even hit 3-wood or long iron. You'll still be just as long, if not longer, than your playing partners. And, hitting from the fairway is much better than the alternative.

Brian