Apply random lines, scribbles and splashes. And aim to move your whole arm, perhaps even your whole body, to help you loosen up. Water-reactive crayons or pens, or the best watercolour pencils are ...

There are strong arguments for practising scribble art before you learn to draw, and creative scribble exercises can also ...

I have the latter sorted, but for the former, I needed an app that lets me quickly jot down notes without bogging me down ...