A few years ago I visited a used book store in Seattle. It had several cats hanging around with the customers, which was pretty cool.
I found a copy of How To Stop Worrying and Start Living by Dale Carnegie, of "How to Win Friends and Influence People" fame.
I bought it, and it's been a great book to keep around when I get stressed out.
One of the exercises in the book suggests creating your own rules for overcoming worry. I wrote my answers down and have copied them here.
I put a lot of energy into stayling relaxed these days. I know that being stressed out will not only not help but rather it will harm me.
This page contains Amazon affiliate links.