I'm a big fan of business history when it comes to brilliant business moves, as well as some pretty awful ones. In terms of bad business decisions, I always find it amusing when I can spot one when it's made and I could see the failure a mile away (Keurig Kold, Sear refusing to upgrade stores to save money, etc.). In my own business as an attorney and a retirement plan provider, I've been able to spot some really poor decisions that I could see a mile away and you can avoid as a retirement plan provider.