How about getting a hobby ? You need to find something that will allow you to tune out. Set limits when you will work, like say 8am to 6pm, after that it's time for other life stuff. Turn off the PC and step back. Currently I am working a fair bit, in fact doing two jobs, and it can be hard to take a break. Normally it doesn't happen until I am forced to do one (like this weekend when I go to Kraków where I won't take the PC).
But I know I will be doing 1 job very soon