Increase Productivity with Power Nap

It is generally said that every adult should get an average of eight hours of sleep. This is the agreed scientific fact so far. See this harvard article for more details.

I am not ready to go by this. Reasons

1. Contradicts the religious beliefs - Allah says pious spend most of the night standing (in prayers)
2. Adjusting to this schedule is really hard given that I need to wake up at 5:30 AM latest everyday

Having heard of power naps, I did some Googling. Out of the results I got, the below site seemed convincing of the benefits of napping.

http://io9.com/the-science-behind-power-naps-and-why-theyre-so-damne-1401366016

Especially, see the video linked on the site above. Its a really convincing one (or is it too nice to be true?)

With some confusion, I turned to Sunnah, to see the guidance of Prophet Muhammad on this subject.

The below youtube playlist was really good, esp the last three clips.

http://www.youtube.com/watch?v=a6514cZM-7M&list=PL891F0A15E304F15A

Below are some important points from the video that took my attention:

1. The Prophet dis-liked doing anything after Isha: Go to bed after Isha.
2. The Prophet fluctuated the time of Isha: This makes sense if that is the last thing you do at the end of the day.
3. The Prophet preferred to delay Isha till the middle of the night: Falls somewhere around 11 PM (the speaker assumes night starts from Magrib)
4. The Prophet naps between Qiyam-al-lail, and Fajr
5. The Prophet makes Qailoolah: Napping in the middle of the day. Assuming day starts from Fajr and ends at Magrib, middle of the day falls somewhere around 11:30 AM. It is customary to have a relief of work between Zuhr and Asr in the middle east, and this is practiced to the date.
6. The speaker also emphasizes on the prophetic etiquette of sleep, such as the recitals, and ablution.

If you are familiar with the concept of Qailoolah and thinking of the right time to perform it, the below article can shed light in it (anytime in the afternoon, before or after, zuhr). 

http://islamqa.org/hanafi/darulifta-deoband/24332

Note: If you are someone who takes time to fall asleep, and thinking that 20 minute power nap is not for you, you may be wrong. Napping is not sleeping. Read the below.
http://lifehacker.com/5501942/how-i-mastered-the-power-nap