Hey Kim, thanks for thinking about the trees, lol. OK, let me think. First, yes it depends on the niche a lot. But I do need to say that it can also depend a lot on the creativity of a blogger. If you know Kiesha from We Blog Better, she is a really creative blogger. She once wrote a post called "What can bag ladies teach us about blogging". And of course, attached a photo of a bag lady. If it was a Flickr photo, you would go back and tell the author you used a photo on your post and tell him the post name. Everyone would be curious to see what the heck is all that about. I wrote about this Flickr tactics on Traffic Generation Cafe. Anyway, why am I mentioning Flickr? Because it would seem that it is the best place to get traffic if you have a photography blog, right? But in Kiesha's example, all you need is some creativity and it can work for every niche. I for example, am hardly using Quora. Everyone else is (well most of everyone, lol). But I am old school and use Yahoo Answers, that almost no one is using. So my results are great with YA. Answer sites require some time, but not more than commenting does and certainly less than guest posting does. And it is fresh traffic, not just bloggers that you connected with. But out of these all, I would focus on the first group, video/audio traffic sources, just because they are kinda up and coming compared to some others. If I can answer additional questions, feel free to add some, not sure if I answered what you needed me to :) Thanks so much for sharing this with your readers, I really appreciate it.
The term “organic traffic” is used for referring to the visitors that land on your website as a result of unpaid (“organic”) search results. Organic traffic is the opposite of paid traffic, which defines the visits generated by paid ads. Visitors who are considered organic find your website after using a search engine like Google or Bing, so they are not “referred” by any other website.