Never work on Saturday or Sunday. In other words, get enough rest.
I can manage my own mind a looooot better when I'm not stressed out or overworked. It. makes the difference of managing life for me.
(It also includes not to do too many exhausting fun things. NOT trying to control things for a day is so relaxing. If I stay in front of the Playstation and just eat junk food for a weekend, then I probably needed that)