Traffic from organic search is free and long-lasting, which makes you less dependent on advertising budgets. If you look at the list of the top three American e-commerce retailers, you will find that it matches the above data with the top three companies getting the most organic traffic. This definitely proves that SEO pays off in the long run: you attract quality traffic in large volumes without paying for it directly.
The following example shows a Client who receives 55% of their website traffic from Organic Search – typically this is a strong performance, but again this will vary greatly based on paid search. More important than the % is the number of sessions itself – this tells us how many visits (note: not unique visitors) we received through this channel. In this example, we have 7486 visits in 1 month that all came from organic searches.
Facebook ads are a great way to get highly targeted traffic to your blog (landing page, fan page, what ever). Although not a free traffic source, it is a great one. The price is not very high and I think it is pretty acceptable considering that you can choose demographics of Facebook users that will see your ad. I had great success getting traffic that converts on one of my niche sites.

On the basis of this article alone, you should be given a Ph.D in internet traffic generation. Absolutely fantastic set of ideas & sources for traffic generation. I had taken a print of this article the first I read it and then took some serious action of some of the ideas that have mentioned here - flickr images, blog commenting, slideshare (this even resulted in some great business leads and closures), sites such as blog engage, blog interact, social media sources such as LinkedIn, forum participation etc. And they have done wonders to my sites. The fact that there are 319 comments here even as I write is testimony to the authenticity of the ideas presented here. Great article which will one day be a classic - if it is not already.

Relying too much on one source of traffic is a risky strategy. A particular channel or strategy can be fantastic for generating traffic today, but it doesn’t mean it will stay the same tomorrow. Some sites lost out when Penguin started penalizing on certain SEO linking practices. Others lost out when Facebook decided to massively restrict organic reach. If your site relies exclusively on only one source of traffic, then algorithm changes can create some serious trouble for you. So be aware of the importance of diversifying and know the options available from different traffic sources.

Wow, great post, Brankica!!! I've used Flickr in the past and while I haven't gotten much traffic from it, I've gotten a ton of backlinks. Like there's this one photo in particular that I tagged as "SEO" and included a link in the description back to the blog post I used the photo in. I guess there are lots of autoblogs that scrape stuff like SEO-related images, and since they scrape the description, too, I get lots of automatic backlinks. Sure, they're crappy backlinks, but still backlinks :)

Hey Jym, thanks a bunch :) Yeah, I don't think everyone need to use each and every one of these, especially at the beginning. But I do find the list useful for those with "older" blogs. When you are thinking "Where else can I go to get more people to see my blog". That is what I do with my first website. Again, I agree with the part of identifying the ones that will work the best, so we don't spend too much time getting no results. Thanks so much for the comment

In all of the above cases, you’ve potentially found a page on your website that could turn into a keyword monster with a little extra content and keyword integration. Although we’ve discussed blog posts in this guide, don’t completely overlook the other pages on your website – these tips will work to increase organic traffic on all pages, not just individual blog posts.
Secure (https) to non-secure sites (http): Since Google began emphasizing the importance of having a secure site, more websites are securely hosted, as indicated by the “https” in their URLs. Per the security protocol, however, any traffic going from a secure site to a non-secure site will not pass referral information. For this issue, you can correct by updating your site to be secure through a third-party SSL certificate.