[doodhwala]

Try out / read about biphasic sleep schedule. It relies on the fact that not all stages of sleep are equally resting to our bodies. And by taking multiple naps, you are likely to increase the duration of the "better" stages of your sleep. This allows you to be equally / more rested using lesser number of hours.

Note: This may not be good for you if you are NOT able to maintain the schedule so do keep that in mind!