Mostly just calorie counting here, and using MyFitnessPal to keep accountable and check nutritional levels, fiber, protein/fat/carb proportions etc. Meat as a condiment with lots of veggies (homemade soup works well here for me). Things that are already portioned out, because I'm busy with work plus 3 other people in the family to cook for, who eat all differently...so I do like Fiber One bars, popsicles, yogurts - and of course apples and grapefruits (natural portion control!)
Oh, and I try to walk or run/walk 3-4 times a week, at least. I was a dedicated runner a few years ago and am easing back into what I can do as a slightly arthritic 49 year old (which is a surprising lot, really)...