The key to building quality traffic is not a big secret, but it is the hardest part of a website. You can create sites better than Google and Facebook, but if you don't have traffic to your site then it is worthless. Have you tried to use Google and the other bigger search engines in the way that the pros use them? Are you wandering what I am talking about?
When it comes to search engines you need to build enough content to go into the search engine so your site is noticed by more and more people. Building content is not as hard as many people think. If all you do is write a new page or blog post every single day you will get decent traffic, but you won't get as many new links in the search engines as need to be in order to get lots of traffic. With traffic comes earnings, so if you aren't motivated yet to add decent content to your site then now you should.
Traffic is all about earning cash now! When you have traffic coming to your site and you have AdSense on it then you have found the key to earning cash now. Earning cash is what the pros look at to value success. So remember the next time you are sitting on your couch wondering how do I get more traffic to my website, it is all about content and throwing as much content at search engines as you can in order to beat out all your competitors and start earning cash now!