First, leave your twitter id after every hub post with a request to follow back to stay updated!
Second, go to fiverr.com and search for twitter follower! you can get decent amount of followers in $5 dollars!
Third, Follow other twitter followers and leave them a message to follow you back!
If you are a good hubber on hubpages try to promote your hubs and profile with your twitter id in web, facebook, twitter, offline: friends, visiting cards, flyer, banners and every thing a high branded business such as walmart, some noodles company use tactics to promote!
Remember: the more people know about you the more it helps to build your brand and thus followers increases!
Have a good day!