Challenge yourself to learn or try something new or different each month.

Grab a book you would never normally read. 

Go somewhere new. 

Sign up for a class. 

Try a new hobby. 

Taste a new food.

Get out of your comfort zone and live your life.

Trying 12 new things a year challenges you in new and fun ways. 

It is not difficult to do and the commitment will make you feel more accomplished.