It takes time ... a few lines every day. If building readers is what motivates you is: read many other blogs to get a feel for what you like and loathe; comment in other people's blogs and then start to write your own blog splitting your time equally between reading, commenting and blogging.
There are millions of blogs out there, getting noticed and then having something remarkable to say every day (no one can achieve that) is the goal.
I can offer tips galore, but mostly it is self-discovery and patience. It has taken over a year for my www.mindbursts.com blog to get from 2 visits a day to the heady heights of 25! And I am working hard at it.
For someone who gets 1,000,000 views a day look at Andrew Sullivan's 'The Daily Dish.'