1. Target lists coupons on its website. You can find the link at the bottom of Target.com and the coupons are nicely organized by category. It's always a good idea to check the coupons before you go especially since Target lets you double store coupons and manufacturers coupons on the same purchase.
2. If you purchase something and the following week it goes on sale bring in your receipt and Target will reimburse you the savings. I've done this quite a few times and I've saved quite a bit of money as a result. Note: Customer service does require a receipt and the purchase must have been made within seven days of the sale.
3. Target honors price matching. If you find the same item at another store for a lower price bring in the ad and Target will honor that price. And, you can still apply your coupons to that lower price. However, make sure the product is the same brand, same style, quantity, etc. or the price match won't be honored.
Hope these little tips leads to more savings.