I am admittedly weak when it comes to Cycles. How do I set up a mirror using Cycles?

I am using an older prop mirror that I had to change a lot of the materials with because it was created using old Firefly cheats, but I am not sure how to set up the actual mirrored surface. Cranking up the value in the reflection node isn't doing what I want.

If I had a nickle for ever time a woman told me to get lost, I could buy Manhattan.