I encourage you to approach exercise the way you approach your job. You simply have to show up. Getting yourself there—to your health club, your favorite walking path, or being on time to meet with your person trainer, is half the battle.
Also, go on a search mission for the reason to exercise that ignites your drive. Maybe it’s “I feel better about me when I exercise,” (I know I do!); or “I really want to work on losing ten pounds.” If finding your reason for working out still doesn’t get you exercising, fake it til you make it. Remember, starting is the hardest part.