Blogs that are continually being updated on a steady consistent basis will get much more activity and interactivity than a Blog that only gets updated once a month.
It will get spidered more often and more deeply just based on being frequently updated.
What other ideas can you come up with for improving readership and response to your Blog?
Contests are ideal for Blogs because of the frequent interaction between Bloggers. Also remember the Human Interest Angle is Powerful. Especially when you’re publishing true stories from your readers.