Commenting and becoming a part of a community is always the best way to go. I have seen some moms advertise their blogs on small sites and other mom blogs. That usually will bring in a trickle or a steady streadm of readers -- depending on the duration and of the advertising.
I do this in 'link love' posts. I try to offer one post each week of various posts that I have read around the blogosphere. This hopefully brings in the owners of those blogs and anyone that might read the trackback, etc.
Reading, commenting, and linking to other blogs are all important. Also doing a group writing project with other bloggers can drive a lot of traffic, especially if all the bloggers involved promote the project.
Developing relationships with other bloggers who have similar sized blogs to yours can help, too. You can network and grow together.
Participating in blog carnivals is another good way to drive traffic.
Being active on Stumbleupon, making stumbleupon friends and making it easy to submit your posts to Stumbleupon can also drive traffic.
Other free ways to get your site stumbled without
having it tied to your account (so people don’t see you
are stumbling your own site) is to exchange stumbles
with other people. You can find free-stumble offers at:
I have posted a blog a week on some sites- Yahoo Shine, Blogher with a link back to my site. I belong to a few mom communities- one with your own profile page with a feed reader http://www.mommytalk.com/view_profile/mid/3389 this is from Novafeed- Has a short clip of your most recent blogs easy to do just enter your URL- Twitter not to mention Mom bloggers Club:)