[Lawtan]

I don't really have a set method...usually I just build and build until I crash and essentially pass out.

However, some of these...maybe...

Meditation used to help, and music. The former, my therapist advised against. The latter, I forget in the "I have to do everything"-a-thon.

Drawing and writing helps. Not so much about the subject itself, but about things I like.
That, or making the anxiety/thoughts an abstract entity that I can then mess around with (distracting me from what it is). Tend to wind up something like "Cthulhu and Roadrunner"