This decision should be paired with you making yourself accountable for your actions. You must place just as much emphasis on maintaining good health as you do on your career, daily responsibilities and material possessions. This is because, all too often, people don't realize how important their health is until it is either seriously jeopardized or completely stripped from them altogether. By then it is too late. Understand that to get started you don't have to go overboard.
Many people make the mistake of trying to do too much too soon.
Don't be afraid to make your ultimate goals big. You may or may not reach them, who knows, but the success comes from chasing those seemingly unattainable goals. Combine this activity with strength training exercises that work all your major muscle groups, consistent stretching, and healthy eating habits. You must look at all these activities as one system and commit to this system. If you stay focused on your goals you will be more apt to push through the times when you don't feel like working out or when you feel like you aren't getting better.