I have been blogging since October 2007. The first year was very slow, and I simply blogged for family and friends. Then after a year I started getting a few non-family readers and started networking and getting on forums and twitter, etc. It grew relatively fast but then leveled off last Spring. I think the more active I am in a variety of online forums and things, the more traffic I get. Comments on other blogs are always a good way to drive people to your site as well. And good, fresh content is always a plus. :)