Firstly, a disclaimer – don’t spam Reddit and other similar sites hoping to “hit the jackpot” of referral traffic, because it’s not going to happen. Members of communities like Reddit are extraordinarily savvy to spam disguised as legitimate links, but every now and again, it doesn’t hurt to submit links that these audiences will find genuinely useful. Choose a relevant subreddit, submit your content, then watch the traffic pour in.

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.
Website traffic is an indicator of how popular content is. As a website operator, the corresponding value also gives you an indication of how much traffic you need to generate to achieve similar success with other projects. Suppose you want to build a profitable blog on a specific topic: then you should know how much traffic the most successful bloggers generate in this area. By using a detailed competition analysis, you can then estimate which measures work for the competition and which ones don’t – conclusions that you can then use for your website.
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.