I played a lot of golf in the '80's and '90's. Never got very good at it. I think it has a lot to do with Mike's observation above about relaxation. In those days, I thought if I kept trying as hard as I could, I would get as good as I could get at golf. Trying did not help me to play better golf, although I did learn how to deal with frustration better.
In the last few years, I've found that if I stop trying and relax more, I shoot better archery. I think the problem is that in our culture, we think that if you're not trying, you're giving up. But another alternative to trying is relaxing, or another way of saying it, becoming more aware, since you can't really be aware of what you're doing if you're trying.
Maybe if I'd discovered this 20 years ago, I would have played much better golf. But then, maybe I would never have discovered archery, so I guess overall, I'm pretty happy with the way things turned out.