It’s very easy to beat oneself up for not finishing tasks like decluttering, but there are usually pretty good reasons for it. Sure, laziness or lack of motivation can play into it, but what makes tasks difficult is not the actions, but the decisions involved. In fact, my favorite definition of “clutter” is Barbara Hemphill’s “postponed decisions.”
Beware the inbox. On the face of it, an inbox makes sense. It provides a single collection place for your unsorted items. The problem is that you gain a false sense of organization, because while there is an easy plan for entrance, there is no easy plan for exit. The best solution may be no inbox at all.