If you are using Mozilla FireFox (which you should immediately download if you are still using Internet Explorer), make sure you set a master password for your profile. Otherwise, all of your saved passwords are accessible as plain text in the options screen!
To set a master password, go to Tools->Options->Privacy->Saved Passwords and click on "Change Master Password".
My favorite "why FireFox is better than IE" article is here. Why? Because it's a SLATE article, and that's just funny.