When considering a social media marketing strategy, knowing who to follow on Twitter is very important.
You want to follow those who are interesting to you.
You want to follow those who can benefit you and your business.
If they aren't already following you, most of the time they will in turn, follow you back.
That opens up the chance for dialogue between your business (you) and your following (your target market).
Here's a list of some handy dandy online tools that can be used to make finding the right followers easier and more organized.

• MrTweet.
  com - Show the influencers and followers you should follow and suggests you to enthusiastic users relevant to you.
  (Scheduled to launch an even better application this month but the "classic" version is still available)
• Justtweetit.
  com- A user directory for Twitter organized by genre to allow for users to easily find other Twitter users to connect with.
  
• Retweetrank.
  com - Retweetrank lets you find rank of any twitter user.
  With the rank, latest retweets of the user are shown and an RSS feed can also be grabbed for the same.
  
• Twellow.
  com- A directory of public Twitter accounts, with hundreds of categories and search features to help you find people who matter to you.
  
• Twitterel.
  com - By using Twitterel.
  com you can make your life a lot more interesting, we thought of a way to connect to other twitter users who share the same interests as you do.
  
• FriendorFollow.
  com - Who are you following that's not following you back? Who's following you that you're not following back?
• Twitoria.
  com - Twitoria is a web app that tidies up your Twitter friends list by revealing inactive friends that haven't tweeted in a long time so you can unfollow them.
  
• Topify.
  com- Twitter application that improves Twitter's email notification and allows to follow and reply to direct messages by email.
  
• Tweepler.
  com - A Twitter application that allows you to organize followers.
  (Currently down for service)
• Linked In Tweets - Linked In has added Twitter functionality to it's list of services, so you can choose to follow your 'connections' on Linked In