The midafternoon slump is very real. But even if it's a little late for (another) coffee, you don't have to just tough it out. Strategic snacking can help. The key is to resist the urge to eat something that's basically all sugar. "When your energy's low, it's usually a result of low blood sugar, and when you have a higher-sugar snack, you'll get a boost in energy. But it's also followed by a pretty severe energy crash," says registered dietitian Jeanne Reilly. So, what's a girl to do when she wants to dig into something sweet but needs to keep her energy level steady? Try one of these healthy snack ideas.