Shoulder Turn
The first step in hitting a 270 yard tee shot is to think about a 90 degree angle. This angle is the shoulder turn. To measure the shoulder turn, Bobby Steiner suggests looking at the middle of his back. If you can see the middle of his back, then he has turned 90 degrees.
Risk
The second step in hitting a 270 yard tee shot is to think about another 90 degree angle, which is risk. Bobby Steiner suggests measuring the risk by looking at the angle between the left forearm and the club shaft at the top of the back swing. If you maximize your risk, you have accomplished the second leg of the 90 degree angles on your way to 270.
Arm Swing
The third step in hitting a 270 yard tee shot is to think about arm swing. Bobby Steiner suggests measuring the arm swing by looking at the upper arm of the right arm and the lower arm at the top of the back swing. He suggests that it should look like a waiter holding a tray of glasses at the top. If you have done this, you have accomplished the third leg of the 90 degree angles on your way to 270.