The most aggressive way to get followers is to just blindly follow everyone. I have seen some people do that. It works, but it also shows that all you care about it is getting more people to read your own work.
The natural and I think right way to get followers is to read Hubs that interest you, and then if you like them, and you think the general topics of that Hubber are interesting/close to yours, then you follow them.
I usually leave comments on a Hub or Hubs that I like before following a Hubber as well.