Absolutely, I've suffered with this for most of my life.
My psychiatrist insisted my memory issue was not because of my medications, but I really find that hard to believe since I seemed to be ok until she put me on so much stuff.
But you are so right, being overloaded is a direct contributor.

Guided Imagery is basically creating a peaceful place in your mind and you're supposed to 'go' there whenever anxiety or stress starts to set in.
You're supposed to really 'put' yourself there and incorporate all 5 senses
Ex: one of mine is the mountains. I hear the birds chirping and an eagle's cry up above, a river nearby....smell the pine trees, feel the warm sun, etc etc....

The hard part for me is staying there. I get sidetracked too easily.
I'm still trying to get the hang of biofeedback. Do a google search and you'll get the main idea.

I'd like to find some of that PS 100 that Vowel lady talks about. I looked for it at Walgreens, but I think I'd need to go to a specialty store here in my small town.

Rae