Very nice work!
I understand you pretty well... I used to make the same mistake as you: I preached others to pay attention to overworking and avoid burnout, but in the end I didn't follow my own advices. Now I've been able to change that situation, and I pay more attention... but I must keep the guard high: often, in the weekends, I look around my house to see if there are chores or little works to do, to fill my entire "resting" time.
Overworking can be a real pain in the ass, good thing that you managed to fight it! Keep it up!