There are a few things you can do to help you hit your driver straight. First, make sure you have the right grip. A good grip will help you control the club and keep it on-plane. Second, take a practice swing and focus on keeping your arms straight. This will help you get the feel for the proper swing plane. Finally, when you swing, make sure to follow through and finish high. This will ensure that you've hit the ball squarely and with maximum distance.