I'm not sure where my biggest clutter spot is. My DH never puts anything away. Anything he uses he leaves out. I am looking at the coffee table in the living room right now. There is a weeks worth of newspapers, 3 flannel shirts and leftover parts from him fixing the toilets on it. I am sure there are a couple of coffee cups there etc, etc. He does the same thing to the kitchen table. He will try to claim it it all my stuff. He will clean it up if I complain to him.
The worst mess that I make is my sewing room. I have run out of space for fabric. I do seem to think better in a somewhat cluttered space. right now it is pretty bad. We are having an auction at retreat in March and I plan to take some of the things I will probably never use there. The money from the auction goes to the deposit for next years retreat. Last year I made up a couple of kits that brought a good price. My guild is having an auction in September. I will clean out more stuff then.