Okay, so now you know that exercise really does make you happier. But if you don’t have an existing workout routine, the hardest part might just be motivating yourself to get out there in the first place. Luckily, we’ve teamed up with positive psychology coach Derrick Carpenter to create a 4-week track of science-based activities that will get you pumped to start—and stick to—a fitness routine. (Seriously, it’s possible.) Click here for more details.