I made my self a promise when I started this that I would not fall into my old habits. My old thinking was if I was going to exercise more, I needed to BUY something. Instead I fought all urges to run out and make a purchase and instead worked with what I had available. In the beginning, I walked a lot and I danced. There are several youtube channels with dance exercise that I played on my TVs blueray player and danced along. I made my purchases part of my goal/rewards. When I hit X pounds, I purchased new shoes, a gym membership, Tai Chi classes, etc.
For me, running out and buying something never worked. The purchase made me feel like I "accomplished" something and actually worked against my goals in the long run. If that makes any sense. Currently, I do 60 minutes of cardio 6x a week, weight training 3x a week, tai chi and yoga 2x a week and am down 140 lbs in about 18 mo.