It is true that some grocery stores will double or triple manufacturer's coupons. One grocery store that does this is Publix.
No, there are not any stores that will triple manufacturer retail coupons. It is common for stores to double manufacturer retail coupons, but not triple the coupons.
There are many sites which provide coupons for grocery stores including the grocery stores of choice themselves. You can also find coupons at coupon sites such as Retailmenot.
Most grocery stores will accept printable grocery coupons, and you will want to check with the specific stores you shop at. There are a few stores who will not accept printable grocery coupons due to fraud.
Some of your local grocery stores will do this. You will have to go to the grocery stores in your area and see which ones will in fact double coupons.
CouponSuzy.com is an excellent source for coupons. Your local grocery stores or drug stores also have their own websites that provide coupons that can be printed at home.
steal them...
krogers
You can use Smart Balance coupons in most health food grocery stores. Most health food grocery stores will accept manufacturer's coupons.
Yes, if they have it available online then they will accept the grocery coupons.
Yes there are some grocery stores that have their own coupons you can get in store or online. Albertsons is a great grocery store to go to as well as Winco. If these are not located in your area, you can ask your local grocers if they have their own coupons.
There are multiple sites that offer coupons for a variety of products and stores. Sites like Coupons, Grocery Coupons, Coupon Mom, Grocery Guide, and My Coupons all have redeemable coupons at Kroger and other stores.