The key to successful dieting is to transform eating from a biologically-mediated process into a cognitively-mediated process based on counting calories. Given this cognitive feedback, your stomach will actually adapt to a new calorie intake level, lessening hunger. Hunger can also be managed by eating more satiating foods and drinking water.
Caloric deficits (or surpluses) work like clockwork. The metabolic slowdown discussed in the article has marginal effects if any -- perhaps a couple hundred calories worth per day at most. A simple thought experiment shows us that the idea of a "set point" body weight is ludicrous: at starvation, of course, the body cannot possibly maintain weight.
The reasons why many people fail at dieting is that people underestimate the amount of effort/pain required:
http://www.cracked.com/article_18544_how-the-karate-kid-ruin...