Tracing a straight plane line with a laser or flashlight. Helps you get your "groove" back when you're swing has gone away. To do this drill you simply use a cheap flashlight attached to the grip end of your club and have the light point at your belt buckle-ish. Draw or imagine a straight line that goes for infinity in each direction that is in-line with the ball. Use the flashlight to trace this line, meaning the light should always be pointing at the line unless you are parallel to it. Meaning around hip high and at the top/end of your swing.
Another favorite of mine is combining this drill with practicing your backswing IN FRONT of a wall. Meaning your back is to it. Start by standing 2-3 feet away and complete your backswing and don't hit the wall. As your swing gets better move close to the wall. This helps from getting too flat in the backswing which makes it very hard to make an effective motion into the ball.
