It’s no wonder so many of us struggle with energy issues. We go, go, go from morning to night, running on little but grit and caffeine. But it doesn’t have to be that way. “The reality is, you can get a real boost by making a few simple changes,” says Dr. Nada Milosavljevic, director of the integrative health program at Massachusetts General Hospital. That’s why we put together this complete guide to all-day energy: It’s packed with proven strategies that will keep you powered up as you plow through your to-do list. You’ll also learn about surprising energy drains (social media, we’re looking at you)-and how to keep them from stealing your mojo.