When it comes to SEO and promotion everyone of us has different approach and techniques. I am going to explain mine. I am more focused on writing useful content with high keyword density. Let's say for example my Blog. We will focus our discussion on SE listing and indexing. 1. On the first week I had 1 article and it's all about Social Bookmarking lists. The page was indexed within 24 hours by google and it give me around 50 unique per day because people who are searching for social bookmarks related keywords found my site. The page was indexed on the first page and it appeared to all searches using "social bookmarking sites" keyword. 2. Added another lists of "advertising forums". Google gives me a daily unique of around 50 again 3. Added another posts of "dofollow forum lists". Google gives me another 50 unique daily. 4. Added another lists of "freelance sites" and google gives me another 30 unique per day.. 5. So on and so forth... For every article that I posted on my blog, I am adding chance for my site to be more visible in search engines due to its keywords-rich articles that people are always searching. Now my blog has more than 20 articles with high density keywords and in-demand information. Imagine these 20 to 30 keywords, each would give me 20 visitors daily without doing anything - that would be a lot success for me.. and I have more than 100 highly competitive keywords occupying 1st and 2nd page of google and search live. You can do that same... content is king.
If your writing content with large keyword density readers may notice this and feel that you are not writing for their satisfaction more the search engines. I would be careful when doing this, i try to keep my keyword density around 5%
I find there's a fine balance between keyword SEO and 'flowing' articles. When I'm writing for my blog, it's hard not to get carried away and stop thinking about keyword density. Easiest thing for me is to write an article on a particular subject, then when you're finished shuffle the content slightly and add a sprinkling of your keywords.
You will not notice about my keyword density because most of my articles are not just an ordinary posts... most are lists that have descriptions so the keywords could be repeated several times on sites' descriptions..