Fantastic post Tom! There's a lot of confusion on direct traffic to begin with. These are even more finer nuances that you have explained. I have a client whose top source of traffic is direct, and part of it is maybe due to the fact that they don't do any promotion, and it's mostly shared around internally within their team. But I just noticed that their URL is http and not https so this might be something for me to take back to the team. Thanks!
This is a great piece of work for references, lots of info on this, Answer sites have become less and less popular, but the you can really build your name on these sites such as forums, if you are consistent in answering questions frequently. Out of the points you have mentioned, I relay enjoy the "Guest Blogging" point, as this is a win win situation, not just putting out content on other websites, but also welcoming guest on my own site, giving readers a change and a different style of article, as everyone is unique in their own way. I'm actually posting an interview tomorrow with a well known name in the guest blogging. Whichever point one choices from above, consistency is the key, there is no point doing it once, but it should be done on frequently, and over time with patience you will start to see the rewards.
To sum up all of this information, even organic traffic, like direct traffic, has some gray areas. For the most part, though, organic traffic is driven by SEO. The better you are ranking for competitive keywords, the more organic traffic will result. Websites that consistently create content optimized for search will see a steady increase in organic search traffic and improved positioning in the search results. As a marketer, it is important to look at your keywords and high-ranking pages to identify new SEO opportunities each month.  
The good news is, however, indications are that dark social should decrease more and more over time, as social media as a sharing mechanism -- as opposed to email -- only continues to grow. In fact, in the same article we mentioned earlier, BuzzFeed cited a preference with millennials to share over Facebook and Twitter, alongside a longer term downward trend of sharing over email.
When you run an email marketing campaign, we hope you're including links in that email that lead recipients back to your website -- to read more content, convert, whatever. When you take a look at email marketing as a source of traffic, you'll be able to see how much traffic is sent to your website due to email marketing campaigns you've sent out. That's how we found out, for instance, that driving blog email subscriptions was extremely important to the growth of a business blog -- because many of the visits we receive each month come from subscribers who get pinged in their inboxes that a new blog post is published, prompting a click through to the post! Just be sure to include tracking tokens in the links of your email, otherwise the clicks won't be properly bucketed under the email marketing source. 

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
Brankica, Excellent list. The only one I could think of is mentioning through email to family and friends. Example: Hey Guys and Gals, Sorry I haven't been in touch for a while. I've been working my tail off building something I hope will be special. I would appreciate it if you could do me a huge favor. My blog is still new and I need some opinions on where it can improve. Let me know the good, bad and ugly:) Also, can you pass it along to some of your friends? The more opinions the better idea I have at what works and what doesn't. etc. Thanks for the post. Live it LOUD!
So, how can we minimize the amount of dark social traffic which is bucketed under direct? The unfortunate truth is that there is no magic bullet: proper attribution of dark social requires rigorous campaign tracking. The optimal approach will vary greatly based on your industry, audience, proposition, and so on. For many websites, however, a good first step is to provide convenient and properly configured sharing buttons for private platforms like email, WhatsApp, and Slack, thereby ensuring that users share URLs appended with UTM parameters (or vanity/shortened URLs which redirect to the same). This will go some way towards shining a light on part of your dark social traffic.
The time might have come when you want to secure your website and switch from HTTP to HTTPS. Easier said than done. A lot of issues might appear along the way that can screw up your hard-worked organic traffic. However, there is one thing that can really mess up things for your website while moving your site to https; and that is the canonical tag. 
Understanding the intention of your organic visitors is the heart of search engine optimization. Before you dive into finding keywords for your website or do any other SEO hack to optimize your site, it’s worth taking a moment to determine whether your website is driving the right traffic to your site and if it really delivers what your organic visitors want.
Social traffic is traffic and visitors from social media sites like FaceBook, Twitter, Pintrest, Reddit, Youtube and more. Low prices, best quality – Buy social traffic packages – highly responsive Social Traffic can be delivered from Facebook, Twitter, Pinterest and Reddit. All traffic is fully unique, fully trackable in Google Analytics and has shown low bounce rates and great time on site stats!
The "Direct Session" dimension, not to be confused with the default channel grouping or source dimension, is something different. It can tell you if a session was genuinely from its reported campaign (reported as No), or if it was simply bucketed there due to the last non-direct click attribution model (reported as Yes). I didn't mention this dimension in the article because it has some flaws which can cause brain bending complexities, plus it goes a little beyond the scope of this article, which I tried to gear more towards marketers and non-expert GA users. It's certainly an interesting one, though.
Branica, I wasn't sure what to expect - part of me thought about skimming the article because I figured it would 'read' as all the other articles on generating traffic - I was WRONG! I slowed my skimming and started reading - you made the otherwise sterile information interesting while your pace infused a sense of excitement ... so much so that I want to implement everything you suggested and I have, I guess, what you would consider a niche blog. Thanks for the lists along with your insights on their value, etc. I came upon this article through Blog Interact - and glad to have found you. Peppy
Hey Andreas, there are two main reasons I saw for suspending accounts - mean people and too many links. But they come to the same. On Yahoo Answers, like everywhere else, you have competition. They will flag your answer just so their answer would be chosen as the best. On the other hand, putting too many links in your answers can provoke the same thing. I usually put a link in every 3rd or 4th answer I post. And it is usually the best answer I can make. Glad you will try out the other sources, would love to see the results.
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Using the same 2 steps, we can also filter the All Pages section and the Content Drilldown to explore further how our organic traffic is using the site. A focus on this Organic Traffic is important because this traffic is, in many cases, free traffic that your website is receiving. Focus on doubling down on your pages that perform well and working to identify any pages that aren’t getting the organic traffic they deserve.
Another special mention is Quora. The question and answer site is like a high class, actually-useful version of the defunct Yahoo Answers. Experts find questions in their industry to answer and provide detailed answers, either in the form of a moderately lengthy post, or in a post that links out to their websites. You, too, can take advantage of industry questions by answering them the best you can. Users can vote on the most useful answer, and it floats to the top, so the more useful you can be, the more exposure your link will get.
Beyond organic and direct traffic, you must understand the difference between all of your traffic sources and how traffic is classified. Most web analytics platforms, like Google Analytics, utilize an algorithm and flow chart based on the referring website or parameters set within the URL that determine the source of traffic. Here is a breakdown of all sources:
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