We're in a password protected society. And the problem is passwords that are easy to memroize are easy to hack.
I use LastPass to manage all my passwords. You make one secure password you can remember then let LastPass generate completely random passwords for your important accounts, bank, Amaon.com, etc. Then log into LastPass via your browser, or via the web if you are on someone else's computer, and it fills in the password when you go to that page.
It can be a little tricky at first, but once you get the hang of it, you'll never go back.
One tip, I use easy passwords for accounts that don't matter that much, and harder ones for accounts where I have credit card info.
LastPass is free. If you want mobile version, there's a small fee.