Keeping a food diary will open your eyes
I met with a nutritionist five years ago because I was working out but not losing weight. The first thing he recommended was keeping a food diary. It takes a little work to log everything you consume, listing the calories and adding things up to make sure you don't go over 2,500 calories a day (for a man, 2,000 for a woman), but it will open your eyes on your eating habits.
Now there are all sorts of mobile apps that make keeping food diaries much easier, providing drop-down listings of foods with calorie totals and alerting you when you're going off cource. Fitbit, for example, includes a food diary feature. The upshot of my food-diary experience was a 30-pound weight loss, and it's something you sort of internalize after a month or two, so you don't have to keep doing it -- unless you run into trouble again. Think of it as small-data insight that pays big health dividends.