Part 1 - Install Mirror
I figured that the large blank area over the sink (above the inset) would be a perfect place to put a mirror. I measured to discover that a 12" high by 24" wide mirror would fit just fine, and was able to locate a plastic mirror of those dimensions on Amazon:12" x 24" 1/8" Acrylic Mirror Sheet
Along with a pack of mirror mounting clips I got from Home Depot:
OOK 1/8 in. Plastic Mirror Clip (8-Pack)
With this parts in hand, along with some brass screws (variety kit from Harbor Freight) I was ready to install the mirror:
Part 2 - Install Light
To lighten up the situation, I also added an LED light in the ceiling. I had first planned on putting a light on the wall above the pump switch, which I thought would be easier to install (it would have been). But I ended up settling on a ceiling mount light instead, which of course I got from Amazon:
It was a bit difficult to fish wires through the hole in the ceiling I made to mount the light, and then down to the bathroom light switch wiring. Instead of cutting the existing wire to hook in an extra connection, I made use of these handy splice connectors:
The advantage of these over the conventional auto splicing connectors is that the added connection is a spade - so you can safely remove it later if need be.
Here's the installation process: