The palette tells all

The palette is where a painter's subconscious activity occurs. The goal is to marry the activity that takes place here with the decision-making that is required of an actual painting.
I like to use paper disposable palettes. I will use each page for about three painting sessions or until it becomes too full to use anymore. The larger the painting, the larger the palette.
I've started saving my used palettes to document my mark-making.