"The basic point of mindfulness is to be completely, totally in touch with what happens in your body and the environment around you. You are not reduced to an inanimate clod of earth while you are meditating. You may feel your pulse or your heartbeat. You feel your breathing. You hear sounds and see sights. You feel vividly that you are alive." --Trungpa Rinpoche
That's it. I'm afraid, with full respect to David Lynch, I never could get behind transcendental meditation, which when you get over the fanciness of using a mantra, is basically replacing one thought with another. No wonder it's so soothing.
The TM approach implies there's something wrong with (that one) thought. That feeling of wrong just is samsara, precisely.
What's wrong with a thought--any thought? Just let it be naked. That's what I'm talkin about.