It’s 3 o’clock in the afternoon, your post-lunch food coma has worn off, and dinner is nowhere in sight. You may be tempted to hit up the vending machine for an afternoon pick-me-up, but beware. Most foods that fall out of a dusty machine are packed with preservatives and heaps of sugar that make your blood sugar soar and your body crave a snack with more substance. A smarter approach to deskside snacking: come prepared with foods that help you stay alert and satisfied throughout the workday. Manuel Villacorta, M.S., R.D., author of Peruvian Power Foods, tipped us off to seven healthy mini-meals sure to pull you out of an afternoon slump.