I'll chime in with the former posters in favor of ketogenic diets. YMMV, but I personally find it much easier to stay on a ketogenic diet.
Check out the Applebee's menu (fairly typical): http://www.applebees.com/~/media/docs/applebees_nutritional_...
A 12 oz NY Strip + seasonal veggies will run you about 520-540 calories. That's under half as many calories as any of the fajitas, pasta dishes, and most of the salads. It's also half as many calories as any of the sandwiches.
It's bread and pasta that isn't worth it (unless you're poor and need lots of calories per dollar). The food pyramid makes people think bread is good for you, so people dramatically underestimate how many calories they take in from bread. A typical American diet might have two slices of toast at breakfast, two pieces of sandwich bread or a bagel at lunch, and a baked potato for dinner. These are simple accompaniments, not the stars of the meal, yet they add up to a staggering 700 calories daily. You could replace that with two slices of bacon at each meal and still cut your calorie intake substantially.