If you are hitting the 3W well, leave the driver in the car. Hard to say why you are not hitting the driver well without seeing your setup and swing, but work it out on the range before you hit another driver on the course. 240 Yards in the fairway with the 3 wood should not hurt your game too much and may even improve it.
Best piece of advise I never followed: "If you hit it bad one day, shrug it off as an off day. If you hit it bad two rounds in row, hit the range. If you hit it bad 3 rounds in a row, go see a pro." Seeing as I have never visited a golf pro for lessons/instruction myself, I find it hard to reccomend as I would be hypocritical, but it may help find your flaw. It may also explain why my handicap fluctuates between 14 and 19.
