Scientists agree: when it comes to maximizing alertness, coffee naps (drinking a cup of coffee and then taking a quick nap) are better than coffee or naps alone.
Joseph Stromberg shares how to use this method:
Taking a coffee nap is pretty straightforward. First, drink coffee…You need to drink it quickly, to give yourself a decently long window of time to sleep as it’s going through your gastrointestinal tract and entering your bloodstream. Right after you’re finished, immediately try to go to sleep. Finally, make sure to wake up within 20 minutes, so you don’t enter the deeper stages of sleep, and you’re awake when the caffeine is just starting to hit your brain.
From our own past experience and the throat-burns to prove it, this might be best done with cold brew or iced coffee.