Oh how true that is! When I completed my training to become a tidying coach, I knew that I wanted to set a good example by tidying up our home first. I started clearing out, sorting out and reorganising the whole flat. At first it was really overwhelming and often too much for me! I had to make so many decisions, deal with sentimental items and deal with bad purchases. My family was very supportive, especially in the basement, and they also sorted out and minimised their own things like toys, CDs, books, photos, clothes with my help. It was more work than I thought. It took us about 6 months. Now we have created a real feel-good oasis at home. I'm super happy that we managed it.
And you don't necessarily have to do it alone. It's much easier and faster with a professional or a home organiser, because they already have experience and know what to look out for.