Most importantly though, remember that Pinterest is a community just like any other social media, so make sure you’re active, connecting with others in your niche and re-pinning others’ content too. If you’re just shouting into the void by only sharing your own images, you’re going to have a hard time gaining traction and figuring out how to drive traffic to your blog from the platform.
Twitter has 271 million active users every month. Facebook has over 1 billion active users. Google+ has over 300 million. LinkedIn is over 300 million. Together, these networks are attracting vast amounts of time and interest from Internet users around the world, and those that participate on these services fit into the "content distributors" description above, meaning they're likely to help spread the word about your blog.
Post at the right time. If your target audience is adult males over the age of 50, it probably won’t be good to always post new content at midnight. Similarly, it’s not incredibly helpful if you post about how to make the perfect ‘New Year’s Eve’ decorations for a party, the day of/after New Year’s Eve. Keep your target audience and your content in mind when you choose a date and time to post an update.
That's a screenshot of the AdAge Power 150, a list that's been maintained for years in the marketing world and receives an endless amount of discussion by those listed (and not listed). For example, why is SEOmoz's Twitter score only a "13" when we have so many more followers, interactions and retweets than many of those with higher scores? Who knows. But I know it's good for AdAge. :-)