You have also mentioned Quuu for article sharing and driving traffic. I have been using Quuu for quite sometime now and I don’t think they’re worth it. While the content does get shared a lot, there are hardly any clicks to the site. Even the clicks that are there, average time is like 0.02 seconds compared to more than 2 minutes for other sources of traffic on my website. I have heard a few guys having a similar experience with Quuu and so, I thought should let you know.
Piggy back on the success of others. Create a presence on websites which are highly trafficked. This is beside the Facebooks, the Twitters, and the YouTubes. Figure out the relevant sites in your niche and get yourself linked in there. If you are a music producer, it’s Soundcloud. If you are a Joomla developer, it’s the JED. If you focus on WordPress, it’s the Plugins directory. Find the behemoth in your niche, and piggyback a ride on their success. It's also good to find a niche in your niche. Riding on somebody's success is a guaranteed way of increasing website traffic. Hence the reason people guest post. More on that later.
The best websites have some common elements that have been proven to increase traffic (and sales): they use search engines to their advantage by crafting site content to conform to search engine optimization (SEO) rules, they use targeted search and email marketing to find customers, and they continue to attract customers with strong, interesting content.

Websites produce traffic rankings and statistics based on those people who access the sites while using their toolbars and other means of online measurements. The difficulty with this is that it does not look at the complete traffic picture for a site. Large sites usually hire the services of companies such as the Nielsen NetRatings or Quantcast, but their reports are available only by subscription.