Taking on a new activity or hobby will stimulate your brain and boost your mood through the excitement of a new challenge, meting new people, and working towards a goal. "Some activities to take on include learning how to sail, surf, play tennis, salsa dance, or simply take an art class or acting class. This will spice up your life a bit from daily monotony," says Zerling.

Summer can be the perfect opportunity to get active with a new sport. "With sports like basketball, tennis, or soccer we are able to look past the physical strain it puts on us to enjoy the game. Find a sport you are fond of or good at and try playing at least three times a week. This will keep you active and more likely to continue after summer is over," says Bruce Schlagel, CEO of Advanced Exercise Equipment.