You can save 20% on Culture Code’s excellent task manager, Things, by using the coupon code, “thingspresale20” before January 15th, 2009.
I was using OmniFocus, but after a demo at Macworld I decided to make the switch to Things. I don’t have time to write a full review right now, but I wanted to mention the coupon code, incase there’s anyone out there who was about to buy it.