[Baz]

Going to be a different solution for most everyone - it depends a lot of YOUR situation.

Mine?

I had a lot on my mind.

(Don't we all?)

What helped was getting a lot of stuff resolved - and thus getting my life back under control.

In the meantime, like Vash said - just gotta let some of it go - get it out of your damn head!

Diet & exercise do also play a role - but the biggie is all the crap running through your brain 24-7!