Weight Loss Tips, Anyone?

On Facebook, a friend discusses his goal of decreasing his “girth” in order to fit into size 42 pants that he hasn’t worn for at least three years. Quoth: “I have become a land walrus. I’m going to diet on coffee, salad, and rock ‘n roll. He asks friends for other suggestions re: how to lose weight. I offered the slow but sure path I took when I dropped 30 pounds 4 years ago and kept it off — walking, an average of two miles per day for a year. Then, another year. I tried to drop a pound a month. And succeeded.

Question: What suggestion would you give to my Facebook friend re: how to lose weight and keep it off?