Click here for the Organic Grocery Deals Target Coupon Generator. There are about 10 that expire today including the $1/1 Skippy Peanut Butter coupon that could score you some cheap peanut butter. There are also popcorn, cracker & other coupons.
You might also print out some of the candy coupons since Halloween candy is 75% off (at least). With $1/1 & $1/2 you could easily score some free, or almost free, candy. Click on the Coupons.com link above as they had some manufacturer's candy coupons up earlier this month. Not sure if they are still there or not.
I do know there are Kellogg's coupons at coupons.com that can be combined with the $1/1 Kellogg's cereal Target coupon. Click here for specific scenarios. There are also printable Chex Mix coupons that can combine with the Target printable expiring today. Click above and see all the available printables!