Please make your passwords so complicated that you can’t remember them. Never use the same password for multiple sites, accounts, or applications.
There are some excellent password managers out there: 1Password, LastPass, KeyPass all work well. If you’re in the Apple world, your complicated passwords will sync between your devices. Google offers the same thing with their products. I don’t know if Microsoft offers syncing.
If you have to manually type in a password (ahem, Microsoft Windows 10 on a typical laptop), remember the muscle memory, not the characters. Throw lots of non-alphanumeric characters in there. Interspersed capital letters are your friend.
If a website or service doesn’t allow non-alphanumeric characters, ditch them. They’re not concerned with keeping your data safe.
The More You Know (shooting star).