but, in my opinion, most of those ideas would just add to the clutter, unless one lived in an extremely large home where these ideas could be visually absorbed by the large amount of space.
The main thoughts behind decluttering or organization is that one would want to create a space which appears to not be overwhelmed by all that home owner has collected as those small extras that tend to take up space. Most of these ideas would just add to that sense of clutter, whether grouped or not.
Clutter should be well-organized, mostly hidden from the eye, or at least be serving a dual purpose if at all possible (either within itself or by how it's organized), and not take up any more space than is necessary. The idea is to reduce the amount of space that is needed to 'house' these articles, not increase it, and this would include visually. Otherwise, it would still be still clutter and could potentially affect one physically, emotionally, or mentally.
As others have stated, the best way to deal with clutter is to get rid of it. 'One in and one out' is always a good way to look at this. And for that we can't get rid of, for whatever reason, we must either become creative with our thinking or become super organized. Making our limited available living space appear, or actually making it, even smaller just doesn't cut it.
"Why fit in when you were born to stand out?" Dr. Seuss
"Your beliefs don't make you a better person, your behaviour does." (unknown)
"If everyone is thinking alike, then somebody isn't thinking." George S. Patton
The poster formerly known as Writer Mom (stolen from Prince)