Went from living in San Francisco with a big rented house and garage full of stuff to literally just having a small backpack and living in a foreign country where I don't speak the language and don't even have a 'home'.
Being completely outside of my comfort zone has been amazing, best decision ever. Just enjoying a much simpler life based on minimalism. I also spend a very small fraction of the amount of money that I used to, I consider every purchase very carefully now.
For the past month I have been staying at a yoga retreat center in the mountain area north of Saigon. Clean fresh air, quiet, 2 hours of yoga every day, 2 good veggie meals, a lot of meditation and writing code for my day job and commenting on HN.
I don't plan on writing a book... I'd probably fall asleep if I was asked to read it. =)