Light and colour planning
Once I’ve locked down the composition and design, I render a quick rough to plan the tones and colours. If you do more than one colour rough, you can compare and decide which one works better. The idea of a rough is to quickly get the overall look, so never zoom in and paint details; instead, zoom out to view the entire image and establish the key colours. I never start with a white background, but fill in a dominant colour and paint other colours on top of this base until I’m satisfied with the colour palette.