Maintaining focus in face of criticism.
Impatience when there is no perceivable progress.
Limited resources (money, time, people).
Dealing with uncommitted people.
Being too influenced by negative people.
Getting bogged down with minutiae.
Impatience with slow adapters.
Arrogance that I have the answers.
Keeping people (or getting people) motivated.
OK, I know that’s only nine, but I am enjoying an especially good day!