Study! 
The exact definition of STUDY - application of the mind to the acquisition of knowledge, as by reading, investigation, or reflection…

          This doesn’t just pertain to people in school, this pertains to everyone & everyday life in general. 
Why is that you ask? That is because life is a learning experience, which means if you aren’t learning you are not Living!!!

         If you don’t know what you should be studying in life, then simply study yourself. Knowing who you are, and developing as a person is one of the best subjects to study. Studying one’s self is the gateway to being knowledgable in other life subjects, such as… Love, Happiness, Religion, and Environment. 

Just something to ponder about, hope you have an enlightening day!