Answer:
Invest in yourself. Read a self-empowering book, eat with a healthy diet plan, and take a nap if it's needed. Working on yourself, your mentality most importantly, is the most crucial part of becoming productive and feeling self-improvement. "The world is what you make of it". If you spend your time adjusting your mind and thoughts to what you want it to be, it might not always go your way but it sure as hell is going to keep you motivated (productivity).
