Experience is a great teacher, especially if it’s someone else who’s learning from his mistakes. These examples were sent to learnfrommyfail.failblog.org:
"When holding a DVD in one hand and food in the other, remember which hand has what when you take a bite."
"When running errands where one stop involves going to a bank and one involves dropping off a firearm, drop off the firearm first."
"If you’re prone to impulse purchases, stick to shoes, not tattoos."
"When attending a funeral, never clap after the eulogy, regardless of how meaningful and heartfelt it was."