Very simple if you have a Turbo controller and do not mind getting this achievement in a cheap way. Tape down the A button on your turbo controller. This will cause you to swing 10 shots per hole before "giving up" on the hole. There are 18 holes on each golf course, so you will have 180 swings per course. Also, with the A button taped down and on turbo, you will create a new game automatically since the A button does that too. So, you can get 1000 swings while you sleep since every button press requires A.