If you want a smooth sailing whether in driving to work or to your dentist, taking a flight and attending a seminar is to start early.
By planning the night before what you need to take with you, the clothes you want to wear, thinking about the potential traffic at the time of your travel would greatly enhance your journey. You will be relaxed and actually enjoy the ride.
It is a myth to think that by squeezing every minute and starting late you are saving time. Actually, you are saving time by starting early because you will be better prepared for the meeting and save time avoiding the traffic.
Starting early is the mark of successful people.