[mousepod]

I know other people have suggested something similar to this - here's what I do:
1. Separate all of your anxieties into two lists: manageable (things you have the ability to do something about), and unmanageable (things that you don't). 2. Throw out list #2.

I probably picked up the habit in some anonymous group about 20 years ago... Works pretty good for me. That, and a hot cup of tea.