The folks over at Kneoteric eSolutions have put together a pretty decent list of some common oversights that lead to paid campaign failures.

Some of the big ones mentioned:
  • Running a campaign on default settings
  • Turning a blind eye to geo targeting
  • Failing to bid on your brand name
Don't let my quick listing fool you. The author's listing goes into a great bit of detail. This also looks to be part of a pending two part series on the topic.

27 oversights that lead to paid campaign downfall