These very closely apply to Web/Internet/Application development's downfalls. Not including the user in the development phases and/or testing with users early and throughout the development process. Having a development team that does not have a balance of visual, technical, and production skills can be problematic. Lastly, projects that are technology for technology's sake, very rarely offer success.
Conversely, success comes from getting these things right, involving the user and understanding how users would interact and use what you are building. Having a balanced team so that visual, technical, and production issues can be addressed and solved appropriately. And lastly knowing when and how to best use what technologies will drive success.