Mingyur Rinpoche describes what has been scientifically determined to cause happiness.

http://learning.tergar.org/course_library/mingyur-rinpoches-monthly-teachings/the-cause-of-happiness/

You probably won’t be surprised, that it is related to giving to others.

Receiving, curiously and in opposition to what we may believe, does not increase, but decreases happiness.

Enjoy!

Japan Series