Here are things that worked for me ... - reduce caffeine intake; I've changed from 5 to 2 cups of coffee a day, and try not to have one after 3pm; I feel I can relax when I go home now - exercise; I only walk 3 times a week for half an hour each time, but it has helped tremendously - do some non-coding activities when you get home; whether a hobby or watching TV, getting away from IT and programming for awhile makes…
Walking is a great way to clear your mind and come up with other ways of doing things. Plus, the health benefits are vastly underappreciated.