Log onto Netflix (see Resources) and sign into your account. If you are not already a Netflix subscriber you must follow the links to subscribe to the service.
Click on the "Watch Instantly" link at the bottom of the Netflix homepage. You'll be taken to a page that allows you to choose from a menu of available titles. Scroll through the choices and click on the video you'd like to watch.
Click on "Play" and you'll be brought to the download site where you can get the free Netflix viewer (if the player is not already installed on your machine). Choose the version of the viewer that will run on your computer's operating system, follow the on-screen instructions to download and install the software.
Click on the "Play" button again if the your video doesn't begin playing after the viewer is installed. The video will begin playing.