try to update your blog... have a nice story to attract visitors... social bookmarking help my blog to have a large amount of traffic...
Also I would recommend exchanging stumbles with others on the forum. Its better if you get stumbles organically, but this always helps. any social sites will increase traffic. Just like seo, you need to know what you are doing to gain the best advantage.
digg and stumble upon are social bookmarking site that can boost your site traffic. People digg and stumble to find great content and also vote for a site that you like.