Here's a sneaky trick used by many hackers: they purchase and set up a fraudulent web site that is a close misspelling of a legitimate one. Example: www.faceboook.com instead of www.facebook.com. All you have to do is accidentally fat-finger ONE letter in the URL and up pops a very legitimate-looking fake copy of the site you were trying to get to – and the login and links are full of key-logger malware and virus landmines waiting for you to click on them. This is particularly important for any social networks you belong to. Bookmarking your favorite websites will prevent you from making an oopsie and typing the wrong url.