Check out M80 for the item of the week and what high value coupons are being hid this week.
For those of you who don't know about Old Navy Weekly, Old Navy updates this site every week with amazing coupons like $75 off $100 and $50 off $100. The coupons are hidden. You'll have to do things like click on the flying bird in the background or take the chapstick out of one modelquin's hand and put it on the other's lips. Best thing to do is practice on the old site, so when it updates you kind of have an idea on what to do.
No one ever knows when it's going to update. Typically it's been on Thursdays, but it's been on Frida before too. It's updated at 4pm on Thursday, but it has also updated 4AM on Friday! Just keep hitting that refresh button or F5!