I do a drill called the 5 tee drill. Take two steps from the hole, place a tee. Take 3 steps from the hole, place a tee. Take 3 steps and place a tee in the ground for the remaining 3 tees. Take out the flag and put it 2.5 feet or less behind the hole. Your goal is to putt three balls in, or behind, the hole without hitting the flag stick. Here's where the tees come in. You have to do all three, and if you don't get it at or past the hole, start over and move forward a hole if possible. Once you get to the 3rd tee, take out the first one, at the fourth the 2nd, and if you complete the 5th, the third. Then see how many times you can complete the 5th tee. Stop if you can't complete the entire thing in an hour.