You've seen them on television or they pop up in your email. A sure-fire something that will add x number of yards to your drive. And these gizmos aren't cheap! Golfers pay hundreds for anything that promises to cure their slice. Now there are some training aids (I emphasize TRAINING) that do help you with swing fundamentals but they do not replace THE good, solid swing you develop through practice.
Don't get caught up in the never-ending promise of golf gadgets and gizmos. Practice and check in with you PGA Pro.