-Failure to delegate tasks.
Read more here: “Delegate or Sink!”
-Failure to install software required for business continuation.
Yes, the IT-guy turns inward on himself, stops responding and takes weeks and months to implement simple solutions that the project managers require in order to continue. Be proactive and do it yourself? Keep pressing? Find new IT-guy?
-Failure to communicate with key people.
If people with knowledge do not communicate this knowledge to key people who require it, such as project managers, interaction designers and web designers, the project will fail. They need to know partners, potential investors, contracts and who the rest of the team is.
-People operating outside their core compentences..
If people operate outside their core competences, they will eventually loose track of key details in other aspects. A programmer attempting to lead a project while programming and being busy with that, will not really work well. Address this issues or be prepared to fall flat on your face. Key information will not be delivered and the rest of the team can stop working, they simply cannot continue.