To get real benefit out of Twitter (Facebook, LinkedIn or in fact any other social media), make sure you are selective on who you Follow and to build relationships, rather than just go for auto-follows and reciprocal follows. It isn’t just about who can get the most Followers (although some people wrongly get obsessed with this), as in all marketing effort it is QUALITY over quantity!
This handy tool helps you to find out if that new Twitter Follower is worth following back. Take a look at the Alerts Grader service from those nice and rather helpful people at HubSpot.