My yoga post got me to thinking you might have some answers

My favorite time to stretch/tai chi is when I am exhausted from exercise (long run/or ride) and my mind is in a calm state ( not rapidly jumping thought to thought). Then I am able to concentrate on the stretch and feel relaxed. But I can't be exhausted/spent all the time before I need to relax. What helps you all to feel relaxed--not stressed out. I am thinking along the lines of Andrew Weil and Martin Seligman--authentic happiness.com etc. What helps you lead a happier, healthy life?

thanks--fs