1. Go Deep! There are probably 300 social media sites. Forget 296 of them! Start with LinkedIn, Facebook, Twitter and a Wordpress blog. Social media does take time and effort and consistency is important. If you are spread too thin chance are you will not give enough attention to the sites you do participate in. Spend more time on fewer networks and learn how each site works.
I'd add Youtube to the mix, but as a general rule for someone just wanting to create a clear consistent message for their business, this is a well written piece. If you are looking at branding your business the strategy may need to differ.