Superb resource list Brankica, thank you. I've also included it this week's Erudition, not just because you're in a competition, but because it really is a resource we should all have bookmarked. Actually, I need to make it a study priority and see how many of the sources I can reasonably use on a regualr basis. Link to Erudition | Help files from Information Junkies Anonymous
There’s also other search engines. Ask, Dogpile, IxQuick, and so forth; these are all minor. However, one search engine seems to be gaining market share and exposure, and that’s DuckDuckGo. It has been trending in the wake of Google privacy concerns and some clever marketing from the DDG staff. It’s something you should, at least, pay some attention to.
Google claims their users click (organic) search results more often than ads, essentially rebutting the research cited above. A 2012 Google study found that 81% of ad impressions and 66% of ad clicks happen when there is no associated organic search result on the first page. Research has shown that searchers may have a bias against ads, unless the ads are relevant to the searcher's need or intent 
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.
If your referrers have moved to HTTPS and you’re stuck on HTTP, you really ought to consider migrating to HTTPS. Doing so (and updating your backlinks to point to HTTPS URLs) will bring back any referrer data which is being stripped from cross-protocol traffic. SSL certificates can now be obtained for free thanks to automated authorities like LetsEncrypt, but that’s not to say you should neglect to explore the potentially-significant SEO implications of site migrations. Remember, HTTPS and HTTP/2 are the future of the web.
Organic is different. Matching keywords to user intent means you may be present in many searches. The user may find you consistently, and once they get to your site, they are more likely to stay. Organic users are still your best long-term customers. In my experience, they have lower bounce rates and more pages visited, and they are more likely to return.
Hi , the post is really nice , and it made me think if our current strategy is ok or not , 2 things are important " High quality content strategy " and " Good quality Links " now joining those correctly can pose some real challenges , say if we have n no of content writers who are writing for couple of websites, to be generic let’s consider , 1 writer @ 1 website . We have to write make a content strategy for in-house blog of the website to drive authentic traffic on it and a separate content strategy for grabbing links from some authentic High PR website i.e. CS should be 2 ways , In-house / Outhouse .
Another big benefit to using social media is that it can help you gain more influence, as well as grow your business across board. And although social media has little direct influence over your search engine ranking, it can help your SEO, albeit indirectly. By helping to grow your business and your website, gaining more traffic, more backlinks and so on, this will improve your website's domain authority, and thus, its search engine ranking by extension.
Hi Brankica, Thanks for a great article, you are so generous with sharing your knowledge and I always look out for your posts etc. I recently bought a product for my personal use that really blew me away, so I wrote about it on my blog, and sent the supplier a link. They were absolutely delighted when they saw my blog post they added it to their testimonial page with a link back to me. Indirectly the product links to a topic covered on my website so this was a great way for me to get a little extra exposure. I'm def going to work through your list and do at least something new from it every day. Cheers, Caroline
Hey Caroline, that is one of the great things, being included like that. Happened to me once, when my favorite blogger asked a question on her FB page and then included the testimonials in one of the pages. So not only did I get a dofollow link from a site that is Alexa less than 5.000 but I was so happy to be featured on her blog. Thanks for the awesome comment and I would love some feedback in a week or so, when the first results come in :)
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.