tldr; How do people manage their myriad passwords safely and easily?
Personally I have about 4 different accounts to supercomputers that are 'high security', 3 different e-mail accounts with sensitive personal information, 2 online bank accounts, maybe 10 online accounts which have access to financial information, and then probably 100 additional accounts to random webpages (etc).
Each of these wants me to have a 'high strength' password, i.e. letters + numbers + symbols + cases - whole words or phrases. The important accounts shouldn't be written down anywhere, and none of them should be duplicates. And finally the supercomputer accounts generally have to be changed every few months.
I'm looking for a system, or procedure that I should be employing to manage, organize, or otherwise deal with all of my passwords. I think this is a topic that would be useful to most people. Perhaps there is no solution that doesn't break one (or more) password good-practice rules.