They can't do it all. Projects usually take longer than expected. Some things must be overlooked. The person who talks the most about working hard is seldom the hardest worker. You have to listen for the unsaid. Time must be carefully preserved. One person can sink a team. It's important to know the difference between a fast decision and a slow one. Indiscretion is a career-killer. People and organizations are not inherently logical. Many a lie has been wrapped in a beautiful package. People long to be important. Some jobs are dead-ends and others are dark alleys. Convenience can trump merit. People are seldom purely one thing or another. Groups can be amazingly stupid. You need to look the part. Excuses are irritating. Common values cannot be assumed. Inertia is one of the greatest forces in the world. Communicating clearly is a demanding task. Saying no is a valuable skill. Creativity is nice but execution is crucial. Untreated problems fester. You never know it all.