There are many password apps out there. Apps where you can store passwords and log-in information.Some are free,others cost, but here are a few of them you can find on iTunes, Google Play, Windows:
Keeper Password Manager
I’m an old fashion guy and use an actual password book similar to the one above. They are alphabetized. Fill them out in PENCIL (you want to be able to erase whenever you change passwords) and store away in a locked cabinet or super safe place.
It is recommended that you have different passwords and log in’s for your many sites. Its tough to remember all of them. Try one of the methods above and make your life easier!