Small minds discuss people. Average minds discuss events. Great minds discuss ideas.
So you want to blog but wondering what it should be about! For some reason, many people start their blog as a kind of personal diary. They are posting about their personal life and daily stuff like morning walk, playing with their dog, outing for dinner, etc. This is one of the biggest categories of blogs and unfortunately this is also the category drawing least attention. People have their lives, their stuff, their chores to do and there is no reason why they should be interested in staying with and following such a blog unless it belongs to a celebrity, a social icon or a popular personality whose personal life interests a lot of people. If that's not the case with you, your blog adds to the noise and it goes entirely unnoticed.