I have found that the more space you have the more you can hoard. At least on an annual basis I file everything piled up in my in-tray. I take the time to remove utility bills etc, more than a year old and shred everything. I keep stuff for filings longer. Less often I sort through the folder with instruction manuals and warranty info for items that have deceased and throw them out as well.
Once a year the city has a clean up day and we get the chance to throw out the discarded and broken stuff that is cluttering up the basement or garage. I am not too bad but I could do better. One of the best ways to reduce junk or non-essential items is to move everything you own a long way, preferably overseas. We did it twice when I was a kid and I have done it myself once more. It does mean though that I have very little of anything of age from my family. I don't have any of my toys, no collectors items and nothing to pass on.
I don't relish another move...I have too much stuff now.
3rd