I try to do http://www.natural-stress-relief.com/ meditation at least once a day. When I make the time, it hugely improves my focus, productivity, and general mood.
Yes, that site is sketchy as anything. But the technique works.
The technique seems (from what little info they give) to be a simplified version of TM. A Harvard Cardiologist also created a simplified version of TM and you can probably get the book The Relaxation Response from a library.
Yes, that site is sketchy as anything. But the technique works.