Lets state the obvious. You are going to need to exercise more, or eat less. If you're in a hurry you need to do both.
Why do we eat fast food? Does it really taste that good? Typically its because we are in a hurry. So we fly through the pickup window and eat in the car. This is simply a failure to plan ahead. There is food at home that we can heat up quickly that won't pack on the pounds. So we need to be patient when we drive by those golden arches, and have something at home that can stifle our cravings in a few minutes.