Another Amazonholic with a Prime account here. Been shopping Amazon since it opened in 1994 and access was through a Hayes 14.4k dial-up modem. Back then I ordered printed books,
lol. Now I order all kinds of stuff from Amazon and download my books to Kindle. Shop other online stores as well.
Rather than checking all the coupon sites individually, I Google "Coupons: [item I'm looking for]". The search returns the various sites that have a coupon for my item and I choose the best coupon.