I used to smoke 75 king size cigarets a day. Although this may offend some here, I asked God to remove the desire to smoke one day 25 years ago, and I havn't had a cigaret since. Not even much of a desire for one. As for the corpulance, try this site. Just takes dicipline.
http://www.fourmilab.ch/hackdiet/www/hackdiet.html

Best of all, it's free. No health club membership fees.