Use a password manager. As you create more strong and unique passwords, it will likely be difficult to remember them all. There are many good password managers available that will encrypt and safely store your passwords.
You might even have a password manager built into your operating system — for example, Mac users have the keychain password manager available to them for free. If you don’t want to use a password manager, use a passphrase, for example: “I like big butts and I cannot lie!” might become iLbBaIcL!
Avoid using the “remember password” feature on computers other than your own. When the “remember password” prompt comes up and you are not at your own computer, click on the “not now” button.
On your computer, it is recommended that you set a master password for your browser, as having a master password will prompt anyone trying to see your passwords to enter another password (one created by you) just to show the passwords. Make sure that your master password is different from your other passwords and that it is a strong password. Whether your browser automatically saves your passwords in a master password-protected file will depend on your operating system and your browser. You can ensure that a master password is in effect by checking your browser preferences.