Guy Kawasaki suggests a plan. Among the ideas:
1. Think book not diary. First, a bit of philosophy: my suggestion is that you think of your blog as a “product.” A good analogy is the difference between a diary and a book. When you write a diary, it contains your spontaneous thoughts and feelings. You have no plans for others to read it. By contrast, if you write a book, from day one you should be thinking about spreading the word about it. If you want to evangelize your blog, then think book not diary and market the heck out of it.