I am so behind when it comes to social networking sites. I signed up for twitter but didn't know what to do with it. I need to spend some time reading about it and how to make it work for me. I get some traffic from here and some from the parenting board that I belong to. I have to say though, that there isn't any one place that I can see most of it coming from. Wish I did, then I could target my promos that way!
Twitter is like sending a text message to the mass members that follows you. My twitter for my blog is not set up to a cell phone (it's too 'noisy') but my personal one is. In the blogging community it is a great way so search for giveaways or for a topic. I have gotten maybe 1/4 of my readers through word of mouth through twitter.
Hope that helps
I am just not grasping Stumble Upon. I downloaded the stumble upon toolbar. That's it. What am I supposed to be doing with it? LOL
I get a good amount of hits from Twitter, as well as sites like Mom Bloggers Club, Kirtsy, etc. I find that if you can get a blog post featured on a site like digg or kirtsy, you can get a real boost in hits. Of course, some people just breeze in and never come back, but it's worth a shot.