If you don't have AAA to click through their link for the 10% off discount, you can at least go through a cashback program for 4% cashback.
There are no Target furniture coupon codes out for affiliates -- I checked -- through there are a few good on toys.
If you don't have a REDcard, you can go to a Target store and sign up for the version that's a debit card. It comes out of your checking account just like a debit card, and when you use it, it automatically takes 5% off anything you buy. You can use it online or in-store. Use your REDcard to pay for 5 prescriptions and they send you a coupon for 10% off your entire purchase!
Also, if you're not in a huge hurry, you can save 3.2% if you pay for your order with a gift card you purchase from CardPool. They sell Target GCs for 3.2% off face value.