Jack Nicklaus & Tiger Woods on Your Shoulder

With the PGA Championship ramping up this week, you might be inspired to hit the links yourself to practice your swing. Even though the ball is stationary--and nobody's trying to take it off the tee before you hit it--golf is widely considered the most difficult sport of all. Regular players keep going back for more punishment because, in theory, you're only ever one swing away from the perfect shot. But those who play a lot also have a ton of stuff in their heads--how to do this, how to do that--whereas the best players make it simpler. To help you bring your scores down, we've gathered the best instructional guides by guys who've actually played at the highest level to distill 7 easy things to remember instead of 700. Stick to this list, and you might well break 80--at least on the front nine.