When I'm painting I usually dab my paintbrush on a paper towel, then I throw it away.
I was out of paper towels, so I used a piece of dropcloth. I noticed that there was a pattern forming, so I filled in the blanks with a brush, my finger, and bubble wrap.
And now I have this.
Spring has sprung!
Simplicity is the removal of the useless and the unnecessary--source unknown