I try to follow my body's cravings food-wise. I've noticed that when I do this I tend to keep more energy overall during the day.
However if I have a day where something happens like, I sleep in late and don't get breakfast, I'm usually screwed for at few hours as I try to get my body back to happy-energy / happy-bloodsugar goodness.
I have about 10 pounds (or I should say an inch or two of squishy.. don't care about the weight but more how my clothes fit) I'd like to leave behind, so I try to keep on top of my exercise and moderate how much I eat and I've been loosing a little at least. More I want to just keep good, which even going bicycling a couple times a week keeps my cardio pretty happy.