Whether it is Curves, the YMCA, a local gym, a park, your home, wherever.....doing anything consistently, 3 or 4 times a week, with conviction, works.

If you need a Curves environment, do it! If you need a buddy, find one! Don't get sold on "I must belong or go somewhere", as you don't. If you have a TV, and a VCR or DVD player, you can do alot. Even without that, just get out and walk. Stretch. Do situps. Whatever- just move.