Cliché, I know. Lately, I've been seeing a lot of posts on blogs about getting your target audience to follow you on twitter, facebook, pinterest, etc. I completely agree. You should always be focusing on this. Having your target audience is an unblelievably powerful tool.
With this though, I've been seeing some people say that they have stopped following anyone who wasn't their target audience, didn't have avid reader in their bio, or were authors. This is not a good plan for several reasons.