The first step in building a balanced and repeatable swing is learning how to hold the club correctly. Holding a golf club may feel a bit unusual at first, but you will get used to it quickly once you learn the nuances. Comfort is a huge factor when swinging a golf club, but it takes a while to get there. Forming your golf grip is quite a bit different than holding any other item used in sports.
Take the club in your left hand and hold it about 1/2 inch from the top of the club. Grip it firmly (about a 5.5 on a scale of 1 to 10), but don't squeeze it to the point where you are choking the club tightly or holding it so tightly that you lose feeling in your fingers. Put your left thumb down the shaft of the your club.
Put your right hand over the top of your left hand. Slide the small finger of your right hand down to the gap between your left middle finger and your forefinger. Apply some pressure with your right hand--about a 4 on a scale of 1 to 10--as you place the rest of your hand on the shaft.
Make sure your right thumb is also aligned down the shaft of your club. Both of your thumbs should be in a straight line down the shaft, and they will work together to give you more control of your shot.
Rotate your left wrist to the right about 1/4 inch, just before you hit the ball off the tee, to get added power. This move will help you keep your wrist cocked all the way through impact, and it will help you get your club head through the ball with more speed, thereby creating more distance.
Go to the practice range and work on your grip and your stroke at least three times per week. When you first start playing the game, holding the club like this will probably feel awkward and strange. However, if you go to the range frequently, you will quickly adhere to your new overlapping grip and find that you can hit the ball consistently with a bit of practice.
Tips & Warnings
Don't overswing when standing on the tee. Sometimes when a golfer learns the correct way to grip the club, he tries to swing too hard. That will not help your game.