This is my palette after one class. I usually clean up the mixing areas but leave the paint wells intact so I can reuse the paints. I activate the paints with a spray bottle the next time I use them.
I organise my palette according to the colour wheel in a sort of circular way – putting yellows on top, blues on the right and reds at the bottom left. I further put the warm yellow on the left (towards the reds), the cool yellow on the right (towards the cooler blues). I learnt this from Watercolour for Dummies.
If anyone has a different way of organising his or her palette, please share with me.