Use a damn password manager. You shouldn't be able to forget your password because you shouldn't even be able to remember your password. As in, it should be a random string of letters, capitals, numbers, and symbols, unique per site, stored in a password manager.

Hell, Firefox's built-in password manager is pretty good too and takes basically no effort. It will even automatically generate a password for you when you're on a sign up page. And if you aren't using Firefox (or some more obscure more private browser), use Firefox.