Briefly, I've been using mindfulness meditation techniques to overcome the kinds of things you describe. I don't really think of it as resetting my brain to some kind of societally accepted "normal", just re-setting my brain's default assumptions to things that are more neutral or helpful.

This book is a good introduction:
http://www.amazon.co.uk/Mindfulness-.../dp/074995308X
I think they should hand it out like the pills at mental health care centres. It's fabulous and extremely well-researched; and it's totally worth the price because it comes with a CD of guided meditations also.