When you first develop your blog, developing a readership takes time. The easiest way to increase your readership is to blog to schedule. Decide how many blog posts you will make each month, and keep to that schedule.
Other bloggers can help build your readership too.
"Attack of the Blog Tips Part II" suggests:
Getting other bloggers [...]

In a competitive market, the market leaders pick all the low-hanging fruit and make it difficult for newcomers to get established. However, if you target a niche within an overall market demographic, you can successfully compete within this niche.
For example, pet owners are a wide demographic. New puppy owners are a niche within this [...]