I am 5'10" and 180-185 right now. A year ago I was bumping 200 pounds. My colestoral was around 250, last check 200. I don't put a lot of effort into it, but cut way back on carbs, I eat very little potatoes, very little pasta and soda pop, regular or diet. Sure I indulge once in a while. I also cut my portion size. If I "think" I want a second helping, I probably don't need seconds! My wife and I would get a large pizza, she would eat one or two slices and I would eat the rest. Today thew same large pizza lasts two meals.
Dieting is simple, just eat less calories. The hard part is sticking to it!