As it is a micro blogging so you must tweet interesting tweet to get followers. You can add your twitter widget to your blog.
Some key points to get twitter followers
Make a lucrative twitter profile Make a good avatar Write up a good bio Tweet well and tweet often Be interesting, transparent and provocative Post interesting links. Post multimedia. Repeat your most popular tweets. Search for tweets with keywords related to your topics of interest. Put up "Follow me on Twitter" links. Follow people who follow people that are like you. Follow people who autofollow. Interaction with the other users if you need then you can go for niche. Social Bookmarking of the profile on the bookmarking site like Delicious,Reddit.Digg is the best way to promote profile.
There are other option i.e there are some paid option you can apply like Company who provides Twitter Followers commercially. They are professional so it works great to get Targeted Twitter Followers. To get GEO Targeted Twitter Followers visit http://www.socialkik.com/