I'm more of a morning person, I will usually wake up (naturally, without an alarm clock) around 6am, which gives me a few hours to get some work done without an

I'm more of a morning person, I will usually wake up (naturally, without an alarm clock) around 6am, which gives me a few hours to get some work done without any distractions. I put my information into this survey, and it shows a dip in my "alertness" around 3pm. I've heard that a good way to calculate this is to figure out the midpoint of your normal sleep time (so if you go to bed around midnight and get up at 8am, your midpoint is 4am) then add 12 hours. I've found that napping briefly (10-15 minutes) around this time gives me a lot more energy in the afternoons/evenings.