I recently answered the following question on Linkedin and thought you might be interested.
How can we make Social Media Marketing more economical and Feasible?
One tool that can help a lot is HootSuite. It’s free (for the basic features) and will allow you to easily post to and monitor several social media platforms from one location.
Additionally, for sending information out, I’d suggest having a blog. You can use the rss feed from the blog, hook it to HootSuite, and have it automatically send out new articles when you post them. It’s post one and done. You can also connect your Blog up to MailChimp and send out a news letter every week/month with your most recent posts.
You have three main goals with social marketing.
1) Bring people into your network (follow me, join my group, etc)
2) Deliver interesting information that your prospects and clients would be interested in
3) Answer questions and respond to people talking about you through these social media outlets.
Regarding bringing people into your network, you have passive solutions like having a link to your Facebook page on your website, and having a QR code on a sign that says, follow us. The active solutions are much faster, where you offer a discount or contest entry if they join a certain network. The best active solution is a viral contest, where the person entering the contest gets one entry for signing up and more when they send it out to their friends who sign up.
You will also want to allocate time for searching for people who you know, and adding contacts to your social networks.