What's your favorite piece of "auxiliary" equipment?

[rodrigaj]

For me, its a repurposed cooling fan which I use to dry my brushes. Brushes dry completely in a couple of hours.

 

[GR5233]

These little 4oz plastic cups are perfect for soaking my badger brushes in. Though the ones I use are whiteish instead of clear

 

[ERS4]

Add some non-essential small things.
I've collected a few brass little ladies for razor displays.
Purely to satisfy the imagination. A bit similar to the posters of pin up girls and weapons during World War II.