Unfortunately, most are. Miscommunication is one of the worst culprits for wasting time, increasing frustration, and decreasing impressiveness. More and more often, this is not the case. Be sure to let others know the best ways to reach you, too. Prepare an agenda or a prioritized checklist that includes each point you need to cover in your communication.
Ambitious people have a tendency to become focused to a fault.
We all know people who look out for Number One. When they need help, they turn on the charm. When they don't need help, they ignore others. It doesn't take long for people to figure this game out. Kindness is more than a few well-placed favors.