Here are some of the methods that I've previously tried that have failed for me:
- expandable coupon holder
- labeled envelopes (ie. dairy, canned goods, etc)
- index card box with dividers
- manila folders with uncut coupons that I would have to find and cut before every trip.
Now I use a recycled college 3-ring binder. It is filled with baseball card holders. I have post-it tabs to quickly find the sections that I need. It is quick, workable, portable, and I love it. Trust me, it's nothing fancy, nothing store-bought, nothing manufacturered specifically for coupons, but it's mine, and it works.
How do you file your coupons?