Despite being really tired yesterday (running around a number of places lugging two heavy bags continously for 6 hours), I was well-rested and productive at night:
1-7pm: On my feet
8pm-11pm: Slept 3 hours. Woke up refreshed
Today is a different story. I had 3 interrupted sleep periods and was very sleepy and unproductive the whole day.
7am-9.45am: Slept for 2hr45min, woken up by a phone call
1.45pm-2pm: Decided to do some light workout. Still sleepy
2pm-3pm: Took a nap
3pm-4pm: Phone rang. Talked for an hour
9pm-11.30pm: Intended to sleep for 3 hour but awaken by cat at hour 2.5. Another interrupted sleep cycle means waking up feeling terrible.
Here’s a nicely illustrated article on How to Nap. It should have included the all-important tip — “Remove cat from room.”
Improvement to the current natural polyphasic sleep system: I will limit my afternoon naps to between 20 and 45 minutes on days I’m expecting an important phone call by setting an alarm.