Bad habit

I admit it: I am chronically late. No matter how early I get up, I always leave the house at 8:22 instead of the 8:15 that would get me to work on time. The only way to break myself of this habit is to plan on catching the bus at 8:00, which I will most assuredly miss, but then I can drive and am ready to go by 8:15, thus getting me to work on time. However, once I understand this about myself, then I just say, "Oh, I know I'll just miss the bus anyway, I can move a little slower." And the problem continues.