It's important to keep all receipts at least 30 days after purchases. I have a huge catalog size envelope where I just toss them. (I'd like to say I organize them by store, but I cannot tell a lie:-)
Now I have a backup plan for all my WalMart purchases (paid with a credit/debit card) You can call the WalMart Electronics Payment Hotline at 479.277.2643 and they will look up your receipt and then fax it to you.
I read this great tip at High Class Living on a Middle Class Budget
I consider frugality an art form and a religious conviction. I learned about paying cash for purchases, recycling and reusing just about everything and being generous to friends and those in need from my parents.
My faith instructs me all things are gifted by God and so I am compelled to be a good steward of my gifts. [The highest heavens belong to the LORD, but the earth he has given to man. Psalm 115:16]