How do I make non-printable template instructions in InDesign?

I'm trying to create a business card template for my work and I wanted to add text to the file giving instructions on how to use the template.

How do I create text that won't print once the file is ready?

Answer

Create a new Layer in Indesign via the Layers Panel.

Double-click the new layer and uncheck "Print Layer".

Then place all your instructions on that layer.
To place things on the layer, simply make certain the layer is highlighted in the Layers Panel when you create new elements or paste things.