You can even download digital store and manufacturer coupons directly to your supermarket reward card. When leaving for a shopping trip, always make sure you have your reward card as well as any coupons you might need.
File your coupons in an organized way, by category, store and expiration date. You can use a sorting file made for this purpose to sort by category (or store) and place the coupons that expire soonest in the front of that category.
On week 9, get rid of week 1 coupons and continue this way so you always have the most recent coupons available. When creating your grocery list, go through all your coupons to see what matches your list and bring them with you.