Check out the following pages for some different drills and tips to use to help you around the greens. Improving your short game can help you lower your average by several strokes.
http://www.golfchannel.com/topics/instruction/short-game.htm
http://golfstateofmind.com/4-awesome-short-game-practice-drills/
http://www.golfdigest.com/gallery/luke-donald-short-game-advice#1