I keep my c v s receipts in a envelope and the vr's are thrown into a bag. I did throw some if the vr's away b/c the bag was getting too full...but that took too much time and never got back around to do it again. ( I would cut the vr's in half)
although, the gift cards I got from office max are all thrown away, except the receipts.
not sure how long I should even keep the receipts... maybe a year? but then again, my receipt envelope is not taking up too much space...it's the vr's....lol