From time to time, things get the best of me and I let various forms of paperwork pile up, putting off today what I can do tomorrow. I become the Bizzaro Ben Franklin. This pile can end up filling a paper box or two before I tackle it.
This pile continues to grow larger until I eventually force myself to go through it for an hour or more on a weekend. Recently I completed such a task and...

Well you certainly could save more if you had a habit of reading your receipts.
Nice post. You could also save by discovering that an item was rung twice, or something that you thought was on a discount was not sold as such, sometimes the teller needs to manually enter a code for the discount to count. It is easier to dispute/claim these charges the same day/week than months later.
Lately, I have just been dropping any receipt that I have in a folder and putting it into the file cabinet, otherwise that can get lost. I try to go through the folder in a week, to file what I need away. I have always kept grocery receipts separately into the bank envelopes. You never know when there is a recall and you can check your receipts.
I put all the receipts I get during the day in my pocket. When I get home, I empty them out on my desk. I make sure I enter them in the checkbook and keep them there until they clear the bank. That way, I can verify all the amounts match.