I'm a borderline hoarder. I'd rather see papers in stacks on a table than put away neatly in a file folder. I don't like to throw "useful" things out. My wife and I moved into a very nice condo last summer and I slowly got comfortable with getting rid of things that I won't be using any more. I didn't want to ruin the look of the place with too much of my clutter. It took a few dozen trips to Value Village and Goodwill but the volume of my possessions was reduced considerably.
In spite of having a well designed office and closet, I still maintained a messy looking space albeit with far less stuff. The door to my area was still closed when we had visitors.
I was reading the always thought provoking kk.org a few weeks ago when I ran across The Life-Changing Magic of Tidying up by Marie Kondo. I decided to order the Kobo version (in order to save space).
Her method is based upon years of experience helping clients de-clutter. The anecdotes about her clients lacked the shock value of watching Hoarders. However, her personal stories about her lifelong obsession (I concluded that Marie Kondo is a bit of a freak) with tidying up did inspire empathy and trust. Every time I had a thought about dismissing her advice as being overly detailed, I remembered that I was the one with the problem.
The greatest value in Kondo's book is her advice on handling personal items like photos and mementos. It is very easy to get distracted by them and lose focus.
I followed the instructions and they worked very well for me.