Don't build edutainment.

Don't build an iPhone application.

Don't build a website.

Don't build an application that runs on any platform that is already popular.

Don't build anything that your customers can already understand.

Don't build anything that's like anything that people currently find useful.

Don't build anything that you expect to actually work.

Don't build anything that might turn on you and force you to stake it through the heart before it devours your spunky sidekick.

Don't build anything with a computer.

Don't build anything.