Day #9 - Participate in Social Sharing Communities Like Reddit + StumbleUpon
The major social networking sites aren't alone in their power to send traffic to a blog. Social community sites like Reddit (which now receives more than 2 billion! with a "B"! views each month),StumbleUpon, Pinterest, Tumblr, Care2 (for nonprofits and causes), GoodReads (books), Ravelry(knitting), Newsvine (news/politics) and many, many more (Wikipedia maintains a decent, though not comprehensive list here).
Each of these sites have different rules, formats and ways of participating and sharing content. As with participation in blog or forum communities described above in tactic #2, you need to add value to these communities to see value back. Simply drive-by spamming or leaving your link won't get you very far, and could even cause a backlash. Instead, learn the ropes, engage authentically and you'll find that fans, links and traffic can develop.
These communities are also excellent sources of inspiration for posts on your blog. By observing what performs well and earns recognition, you can tailor your content to meet those guidelines and reap the rewards in visits and awareness. My top recommendation for most bloggers is to at least check whether there's an appropriate subreddit in which you should be participating. Subreddits and their search function can help with that.