The problem with most people who have trouble driving well off the tee is the fact that they haven't mastered their swing before using a driver.
If you are having trouble with your driver a good way to get back on track is to leave it at home and tee off with a 3-iron instead.
While you won't get the same distance initially you will have more room for error and you will have a better chance of hitting the ball a lot straighter.
The idea is to swing your 3-iron in the same manner, as you would do with the 7-iron.
When you have the right control with this club you will begin to get more distance and you will be swinging in a slower more controlled manner.
Once this is translated to the driver you will realize that you don't have to 'hit' the ball.
You will focus more on control with a slower swing and let the club do the work that you might have been expecting your body to do.
Now taking this one step further, you could substitute the 3-iron for your 7-iron.
As strange as this might seem it was the fastest way that one woman I was playing golf with learnt to master her drive.
She played the 7-iron off the tee until she was consistently getting straight shots and reasonable distance.
Her second shot was generally a 7-iron as well, so she was getting a lot of practice with that club.
While the initial shot wasn't going anywhere near as far as a 3- iron, they were straight and on many holes the combination of two 7-iron shots gave the same result for her as a 3-iron and a 9-iron.
After gaining consistency with the 7 she move to the 3-iron off the tee and eventually the driver.
Sometimes it is faster to take a few steps back to progress sooner.
