One of the biggest reasons people drop an exercise program is lack of interest: If what you're doing isn't fun, it's hard to keep it up. The good news is that there are tons of different sports and activities that you can try out to see which one inspires you.
When picking the right type of exercise, it can help to consider your workout personality. For example, do you like to work out alone and on your own schedule? If so, solo sports like biking or snowboarding could be for you. Or do you like the shared motivation and companionship that comes from being part of a team?
You also need to plan around practical considerations, such as whether your chosen activity is affordable and available to you. (Activities like horseback riding may be harder for people who live in cities, for example.) You'll also want to think about how much time you can set aside for your sport.
It's a good idea to talk to someone who understands the exercise, like a coach or fitness expert at a gym. He or she can get you started on a program that's right for you and your level of fitness.
Another thing to consider is whether any health conditions may affect how you exercise. Doctors know that most people benefit from regular exercise, even those with disabilities or conditions like asthma. But if you have a health problem or other considerations, talk to your doctor before beginning an exercise plan. That way you can get information on which exercise programs are best and which to avoid.