If you have hundreds of unique passwords, I don't see an alternative unless you're a savant or use predictable patterns. But that doesn't mean there aren't ways to get around it. For one, using a password manager shouldn't stop you from remembering your most important passwords, especially those you expect to use in other people's machines. You can take some extra care to make these important passwords easy to remember while still being secure. I could go on but everything I'd say is quite obvious.

Oh I use a password manager too. Just pointing out it isn’t a catch all