Get Outside (Even Just for 5 Minutes)
A recent study evaluated 10 different studies on mood and exercise to find that performing a low-intensity workout outside for a short amount of time (five minutes!) spiked self-esteem and mood levels. These levels continued to rise for longer workouts, too. If you're upset, take a walk around the block to calm down and get a positive outlook on life. Bonus points if it's sunny outside, another proven way to fight off the blues.