Here's a discount you'll really want to grab if you're a regular Amazon shopper but not yet a Prime member. For one day only, Amazon is discounting their annual Prime membership by 20%, from $99 to $79. The deal starts Friday, November 18 at midnight EST and goes until 11:59 PST. Hurry, this is a great deal, we've had a Prime membership for 2 years now and the benefits totally pay for themselves! See site for details.