The Coffee Nap

For a real edge, try a coffee nap: drink a cup, then nap for about 20 minutes. You wake just as the caffeine kicks in — and the adenosine you clear while dozing stacks with the caffeine for a sharper lift than either gives you alone.

The trick is the timing. Caffeine takes roughly 20 minutes to reach your brain, so a short nap clears the slate just as the wall goes up.