A lot of people put off exercising because they don't want to get sweaty. If you don't want to get sweaty, why not try swimming for your exercise? Swimming can be a great cardio workout. Try challenging yourself to swim an extra five laps everyday. You'll be in great shape before you know it.
While most people don't have swimming pools in their back yards, swimming is one of the best forms of exercise. It's far more effective than walking and is on par with jogging or running, depending on your rate. Joining a local swim club or YMCA is the best way to gain access to a pool.