How can some people just nap anywhere?

I am so envious of people who are able to take naps easily.

How do they do it ?

How do you guys do it ?

Some people are able to fall asleep as soon as their head hits the pillow….

Some people are able to take “cat naps” or quick power naps in the afternoon….

How ?

I want to learn how to nap more effectively….

Even for 20 minutes…. Is this good to do?

Do I just need to relax more?

I want to be able to nap mid-day, or whenever I feel like it. Like around “siesta” time….

Is anyone here on Fluther able to nap like a champion?