#sleep

Your memory retains more if you spend 10 to 15 minutes doing nothing instead of doing something productive after studying. Pacing your studies with minimal interferences during these breaks helps the process of memory consolidation.

A notable advantage of first and second sleep is that it provides two periods of increased activity, creativity, and alertness across the day, rather than one long period of activity in which sleepiness builds up across the day and the productivity wanes.