Tracking readers?

From time to time I'm interested in what my reader would like to read.

But because I don't use any tracking, I do not know.

When I have a look at my dashboard, I can see that many readers read very short posts: dashboard

This first post with nearly 100.000 visits is just a 5-step tutorial.

So there are two questions:

  1. Does the past - which posts got the most visits - tell me anything about what my readers would like to read in the future?
  2. If I would know what my readers like, would I write more of this stuff?

Actually, I don't think that tracking every reader is worth the cost - the loss of privacy (you) and the loss of integrity (me).