Don’t wait until you’re at your breaking point before you take a break. We stress taking small breaks all the time, and now we’re also suggesting integrating physical exercise as well as walking away from your computer from time to time.
If you have a dog, take your dog for a walk. Maybe you live close to museums, if you do take full advantage and go visit some of them. Whatever it is that helps you relax and let your mind unwind a bit, take an hour and do it. Your schoolwork will be there waiting for you, but at least when you return you’ll be happy to tackle it and get it done.