I've mentioned occasionally that I haven't flown American Airlines in well over a decade: they've always been more expensive and less convenient than Delta or United. But I don't judge (except United), so if you're an American Airlines flyer, be sure to use a 10% off promo code for your next flight. Just play their game, enter your e-mail address, and they'll send you a code. It looks like you can request one code per e-mail address.
I just checked to make sure it's still working, and got this code, which any reader is welcome to use:
Note that the code is apparently only good for flights operated by American and American Eagle.