I've been blogging for about a year now, and I have been getting a consistant growing readership. The best advice I ever read about blogging was have a scheduled post.

I do one post every friday, even if I have very little going on.

I still write blog posts throughout the week, but it's only when I want too.

My Friday post is a have-to commitment I've made. It makes it easier for my readers to know when to come to my site.