That can be read two ways, I guess. You can ‘build up’ followers by genuinely complimenting or praising them, or you can build them up by getting them to follow you. It’s nice to do both and one sometimes leads to the other. I notice peaks of sales of my books on Amazon every time I tweet about it. A word of caution here; don’t tweet too much about your book as it’s annoying. There is a happy medium, taking into account the different time zones around the world. This post on how to build 100,000 genuine followers on twitter talks you through the process. Very easy to understand and after reading it, I now realize the value of the #hashtag. Read more here on the Red Website Design blog, oh, and don’t forget to share this post, too. 🙂 on twitter, of course.
The Writers' Workshop Blog 
This is great! Avidly trying to build a twitter following. Thanks for sharing 🙂
You are very welcome, I know how slow it can be but it’s well worth building up genuine followers rather than buying them, I prefer to do it that way anyway.