Have you heard of Coupon Clipping Services? Coupon clipping services can help you grow your stockpile. If you know an item is on sale that you want to stock up on it is a great idea to order extra coupons so you can stockpile at rock bottom prices. 
Coupon Clipping Services:
Coupon Clipping Services keep in inventory a limited (but pretty large) supply of coupons and, in some cases, entire coupon inserts! They charge a % of the coupon value for handling fees. They DO NOT sell coupons, but rather, they sell their time to clip, sort and store them until you need them. You can expect to pay about 10% of the coupon’s face value in handling fees. Most services have a minimum order of $3-$5 and charge shipping on top of that (very low since you are getting small, lightweight paper)! I love to collect multiple coupons for items I know I can get free or very cheap! Here is an example of how I use this to grow my stockpile. I ordered:
(10)-$1 off Gain liquid dish soap (on sale for $.97)
(10)-$1 off Rayovac (on sale for $1)
(10)-$1 off Ronzoni (on sale for $1)
(5)-$1 off Stonyfield organic yogurt
It cost me $5.44 to order my coupons, but I will have a great stockpile of dish soap, batteries, and pasta. I was able to get 10 bottles of Gain, 10 packs of batteries and 10 boxes of pasta FREE! Coupon Clipping Service I Recommend:
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I see that you listed a few items for $1 with also the $1 coupon. Can you tell me the stores that you are planning on purchasing those items at? Thanks