Sometimes even having multiple monitors can be a nightmare to navigate when using multiple applications. Sometimes, it can be more than one window for a single application. Shortcut keys can sometimes make it easier for users to pilot through multiple windows especially if you are not comfortable with the builtin trackpad. Macbook users can find shortcut keys here.
Windows is not safe from the same trouble as Mac users. Multiple applications used at one time can turn your screen into a maze. Never fear; there are some shortcut keys for you. Finding your last Word document that you forgot to save, or even looking for that pesky Chrome window that had your Google mailbox open, is a few keystrokes away. Windows users can find shortcut keys here.