Don't underestimate the psychologic effects. A few years back I lost about 20kg in six to nine months --- by eating less and better, mostly --- and plotting my

Don't underestimate the psychologic effects. A few years back I lost about 20kg in six to nine months --- by eating less and better, mostly --- and plotting my weight on the graph and watching the slow but steady downward trend was always a big mood-lifter. And feeling better leads to a positive reinforcement loop; feeling good about yourself leads you (well, it works on me, at least) to do more things that make you feel better about yourself.