You can purchase a mini-travel palette from I've Been Framed that is Altoid-size, already has six pans for paints on each side for $9.95. Cynthia Mooney told me in her Art Journal Sketchbook classes about this palette and the M Graham watercolors which work very well in a travel art kit.
Last week, our sketch group met downtown at Powell's Books. I wanted to practice gesture drawing of people. I can see that more practice is in order here.