[z3t4]

What you're looking for is probably "semester". Depending on where you live, your employer can't deny you two weeks off. Then you go somewhere where you wont have access to a computer. And treat yourself well. You should do that at least once or twice a year. You can also set "working hours" and just don't do any work outside those hours. Having a healthy work/life balance will make you even more productive at work.