What should be done in a blog?

This is the question which is asked several times in my mind. As a blogger I should provide good articles to readers. Because I also a visitor in many blogs. Therefore I know the value of a blog. So every bloggers should plan the objectives of the blog. That?s the foundation in a blog. When I start this blog, my target was ?Providing articles in Web technologies, Engineering Topics and Computing?. After some time I understood it?s not a great idea. Many visitors didn?t like a wide of topics. They want good articles in a specific thing.
So the blogger should protect the theme in a blog. It means the content of the blog should be unique, fresh and based on single topic. That?s why now I?m providing articles in Web technologies.
One of another important thing in blog is ?Blog should not be a commercial thing?. But we can show minimum number of ad units. Everyone knows the requirement of money. If you provide better thing from your blog, that?s enough to satisfy with your mind.
I think ?The communicative ability of the blog? is the main successful thing in a blog. Because anyone can give respond to a post by commenting. In this blog I wrote post about a way to add social bookmarking icons after every post in the blog. When I?m preparing that post I knew the method to add a single icon which gives many social bookmarking services. But there was a problem that is when a visitor wants to select a major one likes Digg, Technorati, then the visitor should use separate window. So one of the reader asked the method to add few icons in major social bookmarking systems. But I didn?t know the method to do it. Fortunately one of another reader showed the method to do it. It?s very useful to me also. That?s a big advantage in blog. This is a good example for ?Nobody can first, second, third etc?. Everyone have the same chance. You can get an idea about that happen after reading this post.
Use addthis button in every post in blog