The most efficient nap is the nappuccino. The caffeine won’t fully engage in your bloodstream for about twenty-five minutes, so drink up right before you lie down. If you’re not a coffee drinker, search online for an alternative drink that provides about two hundred milligrams of caffeine. (If you avoid caffeine, skip this step. Also reconsider your life choices.)
— Dan Pink’s tip on tackling the most of the mid day slump, from ‘When‘