I’ve forgotten an important password!
You need you make sure your password is complex enough to make it difficult to guess, while simultaneously ensuring it’s simple enough to remember. The solution? Let OS X remember it for you by storing passwords in your Keychain. Usually Safari will offer to save passwords for you, and will usually fill them in for you when you come back to the website. Occasionally it might not – but the password is still safely saved in your Keychain. Happily, you can retrieve it. Launch Keychain Access (in Applications/Utilities) and then search for the site from the field in the top-right, or browse Web form passwords. Find the one you want and either right-click and choose Copy Password to Clipboard, or double-click then check Show password. Either way, you’ll need to enter your login password.