I highly recommend meditation. Yoga is great, too.
Here's a simple guide to getting started with meditating on your own: link
It's also good to do it with a group, but I usually do it by myself at home.
I also like the way Robert DeNiro's character in Analyze This
said he dealt with stress: "I find the source of the stress, and I break his legs". No, not REALLY! But try the meditation. I think you'll like it.