I love my messy desk in my studio. Somehow it keeps me inspired, I guess.
Seeing everything I am working on or that I stopped working on to be picked up much later, always  makes me want to create more and more.
Sometimes pieces of old work find their way in new work, changing the meaning and lookout completely.
So for me there is definetely no ‘clear desk is a clear head’ . 
I apologize to Marie Kondo.