I have an enormous number of passwords that I could never remember because of the different requirement for each site. You also should not use the same password for all sites to ensure that if someone is able to obtain your password, they are not able to access all of your private information.

I have found that RoboForm is able to keep all of my passwords securely and available for my use.

The only issue I have found is that certain sites have multiple screens for entry and RoboForm cannot attach to some pages (particularly pop-up sign-ins).