Algorithms have their downside, sure, but for someone like me who is often working on other computers that aren't mine, managers are a non starter.
You can even use something like InputStick to auto-type the password into the other computer if you'd rather not do it manually.
Copying over a really long generated password is much harder than an algo you can perform in your head.
For the couple passwords I have to enter on other devices (like Netflix) I often just create them by hand, and choose something easy to type on an on-screen keyboard, and then store it in my password manager. For example: "assdeeeerffghhhjuiop". If the keyboard is sorted alphabetically instead of QWERTY, I'll adapt to that.
I generally only have to type this in once or twice a year so it's not a huge deal.
I would recommend you to use any password, but rotate the credentials every time you enter them in one of these.
It's free, fast and secure. Try ANPM: