Where your Smart TV already has an app in its app pages, start that app, log onto your Netflix account (which you need to pay for) and watch away.
If your TV does not have a Netflix app, give Player a try at
http://www.Playora.com - this is an app that runs on a PC and lets you open content on the screen of the PC and toss it to a lot of different Smart TVs (Samsung, Panasonic, LG, Sony, JVC, etc.). Ithing, It will be helpful for you.