same way I remember anything else in life...by writing it down. here in my location its standard for people to write down things they want to remember. as young as kindergarten they teach children to write down their important information like what their school computer log in accounts are and their accounts passwords. parents too teach their children / teens to write down their log in and password for safe keeping, my point even normal non dissociative people forget things like log ins and passwords\pin numbers/ ....

plus every website that I have registered for sends me an email that says something like...

thanks for registering, your log in is______ your password is ______

if you created this account please click the confirmation link below

________(confirmation link)_______

if you forget your log in and password please use this link

_____(Link to have them email a new password to you)_____

When I get these emails I copy and paste them to my computers confirmations and password folder i created with in my computers documents folder. and print off the email and keep it in a safe place.