You probably think of coffee as a pick-me-up. But its effects don’t kick in for about 30 minutes. That means if you enjoy a cup of coffee just before taking a 20-30 minute nap, you may wake up feeling extra-energized. Just be sure you don't try this hack too late in the afternoon; it's best to stop consuming caffeine six hours before you hit the hay.

Research has shown that although caffeine is a diuretic (meaning it triggers fluid loss), your body can adjust to a consistent intake of caffeine, which negates the dehydrating effect. However, many people who start the day with coffee find that they don’t drink enough plain water by the end of the day. If you’re one of them, try downing at least one cup or eight ounces of H2O (plain or infused) when you wake up. And aim for a target of four 16-ounce servings of water throughout the day to stay well-hydrated.

Feeling a little slow lately? All it might take to get your body back to working at a normal pace is a little coffee. A 2005 study from the Radiological Society of North America found it doesn’t take much—just a couple cups—to improve your reaction time, making you better at everything from noticing something scary like smoke in your home (and realizing you need to grab the fire extinguisher ASAP) to breaking your car for a stop sign.
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