Power nap. A number of medical studies have shown that short napping in the early afternoon increases a person's productivity, alertness, and sometimes even their mood. "A very short, regenerative nap can help you channel your energy and refocus," Tabaka says. Just be sure not to sleep for more than 15 to 20 minutes. Otherwise, it could create problems with your boss.
Counter interruptions. You must have a strategy for dealing with interruptions. Caroline Ceniza-Levine of New York career coaching firm SixFigureStart says, "When someone comes in, all of your strategies shouldn't go out the window." If a colleague comes in and asks for a minute, you can say, "Not right now. Send me an email, and we'll set up some time." One caveat: Don't try it with your boss.