When I use watercolours I like to test my colours before I start a 'finished' piece of work. I tend to let the colour blend and see how far I can push it with water and how well it responds to the paper. I work with some round colour mixing palettes (The Works is a great place to pick up these cheaply). My brushes are Daler Rowney and I try and buy the best brushes that I can afford. I prefer to paint with flat brushes. I don't always use watercolour paper and often experiment with off cuts and scraps from other projects.