I've found that Twitter is a place where you can be whoever you want to be, and very effectively promote your works. The trick to Twitter is to always include an image with each post. If your hub URLs are key worded for SEO (search engine optimization), I would suggest you include the entire link to your articles (not a bit link, or shortened link.) Use hashtags to your advantage.
Tsu is another place where you can be whoever you want, and it's Excellent for gaining followers very quickly. Another bonus is that they pay you for posting original content. Include an original image in each post, include the hashtag #originalcontent, of course include the link to your hub, and interact a little and you'll be amazed at how quickly it catches fire. It's invite only, so if you're not on there already you can sign up through me: www.tsu.co/KateParkerRDH
Google+ is excellent for getting rated well on Google, and Pinterest is great, especially if you have a lot of original pictures in your hubs.
Hope that helps! :)