Most of the successful term to be successful blogger can be describe in some single word. But here I have make some notes.
The first things to be a successful blogger is to be consistent. If you take a long break after writing something, you will not get attraction from search engine or visitors. At least 3 post should be made in a week.
Your blog topic should be attractive, you can not write anything and expect visitors. Do some research before starting your blog.
After starting your blog spend some time on advertising. You can use facebook, twitter, LinkedIn etc as free. But payed add will be more effective.
Do some seo for your blog. Google likes seo optimized blog. Your blog title should be short and simple.
Final word, concentrate on the content that you are writing. A good blog must have a good content.