It's that time of the year when people vow to make changes. Maybe it's time to quit smoking, learn another language or take that kickboxing class you've been putting off all of last year. Regardless of what it is, you want to improve yourself in one way or another. One of the most common resolutions that people make is to get in better shape. It's no coincidence that January is the month when gyms rack up the most enrollments. How many of these new members will you see still see there in April? If you really want to make changes, do it in a way that will set you up for long term success. Don't flip a switch and decide that you're all of a sudden a fitness enthusiast. That's a recipe for failure. Here are five ways that you can make your new venture a successful one.