√ GET SET, GO
You can control so much about the shot before you swing. Things such as gripping it lightly, making sure your alignment is correct and that the ball is forward in your stance so you don't get ahead of it at impact. These points matter, so don't take them for granted. Go ahead and check off each thing before you pull the trigger.
√ STAND TALL
I think posture is key. When I stand taller, I feel like I can get my arms swinging through better. The last thing you want is to have to stand up during the downswing to create room for the club to hit the ball. If you do, you'll make it a lot harder to hit it flush.
√ TAKE YOUR TIME GOING BACK
I like to feel my swing is slow and languid. Luke Donald is definitely one to try to emulate in this department. The key to having good tempo is to take more time getting to the top of the backswing. You really have to let it finish before you start down. Turn until you can't turn anymore. You'll produce effortless power.
√ SWING THROUGH IT
I consider myself a swinger as opposed to a hitter. With irons I'm not a picker; I definitely take a divot after I hit the ball. But when I'm hitting driver, my goal is to swing through the ball like it's not even there. I don't want to just hit the ball, I want to hit the ball with the clubface aiming down the fairway and keep the clubface closing all the way until the follow-through. Sometimes I use the thought of hitting the far outside of the ball to do this.
HAAS has four victories on the PGA Tour, including the 2012 Northern Trust Open. He won the FedEx Cup and the Tour Championship the previous year.