As I've previously mentioned, I try to meditate nearly every day, even if I only have five minutes to do so. I choose to meditate in the morning because I find it sets the tone for the entire day, but occasionally I will also meditate before bedtime. For me, the act of meditation forces me to slow down, to be present in the moment, to be conscious of my breath, to be open and to be calm.
The same philosophy can be applied to one's space. When your space is open and calm, those same feelings impact your mental and emotional health. When your space is cluttered and chaotic, those feelings permeate your internal well-being.
If you've never tried meditation before, you might want to give it a shot, just to see what happens. Start small by setting your phone alarm for one minute, three minutes, five minutes. Then get comfortable, close your eyes and breathe. Don't worry if your to-do list creeps into your mind. Acknowledge it and bring yourself back to being conscious of your breathing.
Try it every day for a week and let me know how it goes. I think you'll be pleasantly surprised by its impact.