When I shop online, (and it's not Amazon), I always search for promotional or coupon codes before I process my order. Usually I type "coupon code" and the name of the store I'm shopping at into my search bar in order to find those money-savings codes. You can often find codes for percentages off, free shipping, or sometimes even free with purchase offers.
It takes a few extra minutes, but overall it's well worth the time spent. Recently, I've started visiting Coupon Chief to look for coupon codes. At their home page, they list popular and new coupons. You can also search for codes for any store.
Coupon Chief has more than 40,000 coupons for over 8,000 stores right now -- making it one of the largest coupon code databases.
I like that they offer an email subscription so I can receive a newsletter in my inbox reminding me of their service and letting me know what new coupons are available.
They also offer an interesting program that pays you if you upload coupon codes that others use. Their Pay-2-Share program will pay you 2% of all sales made via the coupon you upload, for the stores that participate in the program (and there are tons it looks like!)
The next time you shop online, don't forget to search for a coupon code!