Use a password manager. You never have to think about what a password looks like again. Keepass and KeepassX are a very popular ones. There is also PasswordSafe

Use a password manager. You never have to think about what a password looks like again. Keepass and KeepassX are a very popular ones. There is also PasswordSafe by Schneier. Unlike LastPass and many other password managers, they are fully offline. Also, Keepass has full mobile support as well as many plugins, including auto-login on browsers.