When I was lifting weights, I was told eat some carbs before (ie small bowl of oatmeal) and protein after (ie 1 egg, 2 egg whites.) The conventional wisdom then, as now, was varied but I heard cardio workouts on an empty stomach to burn more and eat something before anaerobic exercise (weights) to lift more.
Hope this helps!
Current (10/22/14): 133.6
Mini Goal: 130 by November 26, 2014