I married into an Italian family and with regard to food they feel that you always should prepare more than you need. Running out of food, especially when you have guests over, is to be avoided at all costs.
I feel the same way about coupons, I always want more than I will actually use. I hate to run out of coupons or realize I could have used one that I didn't clip. Since I keep all the inserts I can always go back and clip it, but still I like to have lots of choose from.
Since I clip more than I use, I always have a stack of expired coupons at the end of the month. What to do with them? Well don't throw them away. Military families overseas can use coupons that are up to 6 months expired. There are many organizations that will accept your expired coupons and get them over to those families that can use them. If you google "overseas coupon program" or "send coupons to troops" then you'll get many results of charities that participate.