What are some of the more creative ways you use Custom Properties?

I hope to start an interesting exchange on various ways that SolarWinds users employ custom properties.

What "workarounds" have you done that used a custom property as an integral part of the solution?

Those of us that have been working with SolarWinds for even a short time know all to well how useful the custom property can be. So, what are your stories and use cases?

Let's hear them?