The best way to build a dedicated audience for any blog is to carefully and clearly define its target audience right from the start and then create content that caters to that audience.
Focusing and developing appropriate content specifically for those people helps to ensure there will be strong interesting in your blog content. And it makes promoting much easier.

The target marketing for your online content can be defined using one ore multiple criteria, or various demographic characteristics such as

Age
Education
Hobbies
Income level
Occupation
Religion
Sex
Special interest
Geographical areas
Marital status

I am going list some of the key things I have learnt about blog writing, which may help you to develop some of future post.

Write from heart
Be insanely useful
Keep the readers problem in mind
Don’t just write about yourself
Interact with readers
Write catchy headlines
Don’t be afraid to try new things
Focus on the essential

Follow the above points and your blogging adventure will be off to a great start. There is much more of course, but most if it can be figured out as you go.