I am so often asked to recommend one specific product that will solve all organising puzzles. While there is no such thing, because everyone’s needs are different and varied and multiple, I do have a few things which are so useful that I find myself recommending them often. Here is another of those.
It’s a desk top tidy file. One answer to piles. The drawers are not too deep, preventing a build-up of filing. They hold a surprising amount of stationery too. If you like to have your piles accessible and in your face, this may just be an inexpensive answer.