Ok, after much deliberation about what to do with my excessive quantities of scrap paper, I decided to turn it into...paper. So I began by obsessively dividing it by colour. And so far I have just worked with the greens and the yellows-oranges.
I used these scrap papers to make tubs of pulp.
Then made myself some new paper.
I got about fifty sheets of each colour. Now rather than a big box of paper scraps that I hadn't been able to find any use for, I now have almost 100 sheets of handmade paper that is quite usable. I still have piles of red, blue, brown-black, and white paper scraps with which I'd like to do the same thing; however, the process is so time, space, and labour intensive that I might not get it done for a while. But the results are quite satisfying.