Archery Compliment / Tight Clusters

I got a compliment from a fellow archer today. I don't remember his exact words but it was something like this:

"Wow. You are getting really tight clusters. That is pretty impressive because you're not using a clicker [an Olympic archery gadget]."

My explanation for my tight arrow clusters?

Anchor point, anchor point, anchor point!

Now obviously sometimes you will make a mistake and you will have one shot that isn't near the cluster, but if you get your anchor point really consistent - and your form is super consistent - then your arrows should be in a tight cluster regularly and sometimes even touching one another.

Or on rare occasions you might even hit your own arrow.