When you’re tired and have low energy, perhaps best to eat some meat and take a nap. Or just take a cold shower and a nap. Or a hot bath, followed by a cold shower and a nap. And to prioritize sleeping early that day, to power up for the next day.
Coffee as a best stimulant not when you’re tired, but ironically when you’re well rested and full of energy, and drinking coffee *enhances* your well-being?