Should I work on building my memory ability. Why or why not?

I should work on remembering things. The more I learn the more ill need to recall for future situations. Especially as my day becomes overwhelmed with scheduling for school, home, and social life. The average person has 3 emails and about 15 passwords and usernames for various work accounts. That almost doubles for ones personal passwords and accounts. Working on my memory skills would benefit me if I was ever without my phone and needed to recall a password.