Paperwork is clutter. To stop from being overwhelmed by a mountain of paper:
1. reduce the amount that comes through your door by signing up to go paperless for utilities and banking.
2. Recycle junk mail immediately; keep a recycling box near to where you open your mail.
3. Sort non-junk into two piles; File and action.
4. File and go through your action pile as necessary.
If you need inspiration or help to set up a filing system that works for you then a Professional Organiser like Marquiss Home Management can help.