You might try psyching yourself out by using a computer screensaver which says, “Get moving.”  Or you might post a “get moving” sign on your refrigerator.  In other words, you should be constantly reminded of the value of exercise.  You might also invest in home exercise equipment such as a treadmill, elliptical trainer, or free weights.  The amount of money you spend could be a powerful incentive for making sure that you use the equipment on a regular basis.