When there is a lot of visual clutter in a space I will cover the areas we are not working on with sheets or tarps. This physically defines the space we are working on much like the hula hoop does, as well as decreases the opportunity to bounce around to other areas.
The second way to use the sheets or tarps is to lay them down, often on the lawn, to sort large items into different categories. This is particularly useful when there are multiple people sorting and the person who needs to make the decisions can see the quantity of items in each category as well as duplicates, etc.
There are many different methods for organizing - I encourage and help my clients to find the ones that work for them and stick with it. Aim low and achieve, or overachieve!
P.S. Can you guess why I recommend a white sheet instead of a colored or printed one?