Couponing is not for the faint of heart. It can take a lot of planning, searching for the coupons, finding match-ups to sales, pulling the coupons you are going to use, writing out your list, having a back up plan, and figuring out your out of pocket total. Then there is the possibility that your cashier is not aware of the policy and says you can't use something- this can happen for various reasons. You have to be prepared to either explain how the policy works, wait for a manager to come over or walk away without that item and pick it up at another store sometime.
Walmart is typically very coupon friendly, though they do not double. Their "everyday low prices" combined with coupons can give you some very good deals everyday. Other items are better deals at the high-end grocery stores like Harris Teeter and Bi-Lo combined with weekly sales since they double coupons up to $0.99.
I follow several coupons blogs and forums such as We Use Coupons, Money Saving Mom, and Target savers. One of the other blogs I follow- Couponing to Disney, has a great master list of items you can get from Walmart for $1 and under. I thought it would be worth sharing for you to start organizing your own shopping list, so that even if you have no desire to be an extreme couponer, if you pick up your normal shopping items and combine them with coupons, you will save money. I also like that she has it set up like a shopping list. Click your items and it will print a nice little list for you to take with you to Walmart. Now the real work starts......only picking up what is on your list! :-)
Walmart under $1 master list