I usually

make a simple sketch before I start to paint, but sometimes, when I'm really stuck and have no idea what to paint, I try to approach the canvas in a different way. I use the knife instead of the brush, I only mix the colors partially before spreading them on the canvas, I work fast and I accept failure. The goal is to make something that comes out of the moment, something that I didn't plan. The partially mixed paint and the structure of the canvas will affect the outcome, as well as the ideas that pop up during the process.

The purpose is to have fun, to change the routine and find new inspiration. Sometimes it works, sometimes not, but at least I did something that gave me more experience and that can never be wrong.