The Little Book of Hygge by Meik Wiking - I read this book about 4 years ago. A few days back I read that again. It enthralled me to the simple concepts of finding happiness without making elaborate arrangements or spending a lot.
Sometimes life will give solitude where you have to find your comfort within yourself and with minimum external objects. This book taught me to be happy with ordinary things and mundane days.
Here is a checklist of 10 simple Danish concepts for a happy life.
I hope you will enjoy it.