Social media is so important, today, that there are multiple blogs dedicated ONLY to social media. You should dedicate a little time every day to reading articles just on social media and learn about all the tools at your disposal. This would be a book if I wrote about it here!
Just remember that just like email, but even more important with social media, do not spam. Share interesting, quality snippets and tweets from your blog, and make sure to include the link to your blog in your profile everywhere you go, and always, always, always in your signature file any place you post.