Much of organizing begin with a shift in the brain. Your thinking will affect your approach to organization.
Establish a starting zone. What you want to do is clear one area. This is your no-clutter zone. It can be a counter, or your kitchen table, or the stuff on the couch. Wherever you start, make a rule: nothing can be placed there that’s not actually in use. Everything must be put away. Once you have that clutter-free zone, keep it that way!
Every Space. The point with this way of editing is that you will continue picking zones and eventually get to every space in your home or office.