One thing that works for me when I need to slow down and become more meticulous and focused on my work is physical exercise. Riding my bike, going for long walk's and weight lifting, these exercises all seem to help me concentrate and generally feel better. I think its the extra oxygen that you take into your blood stream while exercising that increases your concentration and ability to focus.
The only problem is in the winter months one can't get outdoors as often, indoor exercise for me is much harder to accomplish, I'm not to crazy about my treadmill.
