I have my list of Top Social Media Sites.
You can link these accounts to key Hubs such as IFTTT, Onlywire, SocialAdr, WeOnTech, etc..to make posts from these accounts super-powerful networks from one place.
Following this strategy you should see a real boost in your SEO / SEM efforts and experience a true expansion of your internet network. Great for all types of websites and businesses.
Social Accounts for your marketing.