LivingSocial All Wet
If you schedule your customer emails ahead of time, here is a reminder to stop and verify that you are selling the right thing at the right time: According to Valleywag, LivingSocial is selling trips to a disaster zone in Colorado. Fail for really bad Timing.
Lesson: Do a final check before every direct marketing effort to ensure that your product and offer are appropriate. Do not send a marketing offer for something you can't sell or for travel to a flooded area.