Ah! The paper mountain! I'm with you! This is my job at our house too, because if it wasn't, it would all end up in the tornado on dh's desk, and we'd have no power, phone service, etc before he realized that *action* is required on some of those pesky pieces of paper. Go figure.
So, my system isn't super complicated, but it works, so I'll share and maybe you can adapt it. First of all, it's *your* system, so if alphabetic stresses you out, don't do it! We use those med-sized plastic folder type things, like this: http://www.buyonlinenow.com/viewprod...p?sku=SMD77254
. (who knows if that link will work!), only ours cost us about 6$, not the obscene 99$ that the people at the link want. It comes with little tabs to write on and slide into the little tabs at the top of each section. We have about 12 sections in ours. Our tabs are things from "car", "house", "bills" (this is where phone, visa and electric go), "Katia tax" and "dh tax" (this is for things like payroll stubs, income tax forms, dh's business related reciepts), we also each have a "bank" section for monthly statements, ect. And, I have a "school" section (I'm still a student, so tuition and book receipts, student loan documentation, certificates, etc). We don't have any debt other than the crippling student loans for each of us, but if you did, I suppose you could make a seperate spot for those. We also have one blank section, for all the stuff you can't figure out what to do with, but you know it needs to be kept. Like, the little list I scribbled out of who sent us Christmas cards last year, so I would be sure to send them one this year, which sounds ridiculous now, but seemed like a good idea at the time. And the garden notes, like "Woman, you need to seed your tomatoes in January, not February!" We use a new folder thing each year just because they tend to be about full after a year. I put a huge label with the year on it on the outside of the folder, and chuck it in the bottom drawer of our writing desk. Eventually, the bottom drawer system will cease to work, but I figure I'll cross that bridge when I come to it.
Good luck developing your own system.