So we move from the MOMA back to the MOMMA. :)
In the painting class that I've been taking we use a lot of paint. Well, we're painting so it shouldn't surprise me that we use up some paint. However, once a color is mixed on my palette, I absolutely hate just tossing it. So, I just started putting the leftover paint on a 9 x 12 canvas paper instead. I didn't think, I just did. This in itself is a good exercise as I always over think things.
I discovered that these little extras actually work fairly well because the colors are already working together in the original painting and therefore work in an abstract too.