There’s a reason why they call work work–it’s not easy, and it can take a lot out of us. We get tired, our minds start to flag during the course of the day, and we lose our focus and concentration. According to Emma Seppala–science director for Stanford University’s Center for Compassion and Altruism Research and Education–there are a number of things you can do to replenish your mental energy that don’t involve drinking more coffee…