I struggle with my driver constantly. I'll have rounds where I really strike the ball well and can hit it 235-245. Then there are rounds where I'm hitting huge slices and I just give up and go to my 3 wood. I can hit it 200-210 and fairly straight, so often times, I'll just start with the 3 wood and never even pull the driver, even on par 5's. I'm never quite sure what the differences are between my swings. I agree with the comments above, practice and range time is a must. I'm also inclined to get a couple of lessons when I can find the time and money. I will say, I always score better when I can get off the box well, because my confidence rises on good tee shots. If I'm in the woods or the bad rough or as often happens, in the other fairway, I get frustrated and my game suffers.