Overview
The best way to challenge yourself is by exploring something new. Probe unknown territory and not only will you really stimulate your brain in a whole new way, you will create a situation where you can really be proud of yourself. You could try something that everyone is intimidated by, like skydiving or bungee jumping. Or you could tackle a particular activity or thing that has always been something scary just to you. Have a particular phobia? This is the day to try to conquer it.