Sleep specialist suggests drinking a “napaccino” – a caffeinated beverage before a short nap – for an energy boost. Dr. Cheri Mah advises falling asleep quickly to maximise the benefits of both the caffeine and the nap. This method can enhance alertness and performance for a couple of hours if done in the late morning or early afternoon. To try this, have an espresso and then take a 20-30 minute nap.