clevelandclinicwellness.com
There are several tricks to reducing stress, mindfulness, singing, exercise, and changing your thinking. Â This article from Clevland Clinic has some good suggestions for the best thing to do under different circumstances.
http://richardwiseman.com/resources/The_Luck_Factor.pdf
The psychologist, Richard Wiseman, has shown that luck is a matter of attitude and behavior, not magic. This links to a both an article on this from Skeptical Inquirer and to the book.