A desire to turn over a new, more healthful leaf typically accompanies the start of a new year. My mail, for example, has been inundated with diet books, most of which offer yet another gimmick aimed ultimately at getting the gullible reader to eat less and exercise more.

Publishers assume, correctly, that the shock of the scale after nearly six weeks of overindulging on food and drink will prompt the purchase of one or more books on dieting by people who are desperate to return to their pre-Thanksgiving shape.

And really, it doesn’t matter whether you choose a diet based on your genotype or the phases of the moon, or whether you cut down on sugars and starches or fats. If you consume fewer calories than you need to maintain your current weight, you will lose.

My advice here is to save your money, toss out (or donate to a soup kitchen) the leftover high-calorie holiday fare, gradually reduce your portion sizes and return to your exercise routine (or adopt one if you spent too much of ’07 on your sofa).