Oh what to do with those last bits of paint on your palette that are soon to dry and be tossed in the garbage? Try flipping it upside down on a new board (or one with a preexisting half-baked painting). Presto, now you've used the remaining fresh paint and can throw away your palette paper guilt-free. I've done this a few times now and am always amazed at how those little bits of color so randomly placed from the palette monoprint added to the end result. At least, I think so.
In the finished painting, the palette bits remain in some areas.