If you buy online — and more and more people will do that this Christmas than before — you probably have seen those boxes and the "checkout" page where you can enter a "promotional code" or a "coupon code" and get a discount on your purchase.  Sadly, you probably don’t have a code, right?

Fear not.

Retailmenot.com is an online depository of discount codes.  It was just launched, but it is sure to grow.  (It’s done by the same people who started bugmenot.com – the online depository of passwords in case you don’t want to register).

So the next time you go shopping, don’t forget your code!