Plan extra time for appointments so that you plan to arrive at the building 10 or 15 minutes before your appointment and more if you are not familiar with its location. If you arrive early, you'll have time to use the restroom, get a drink of water, gather your thoughts, and present yourself in a calm, relaxed way at the appointment time. If you are late out of habit, mercilessly extinguish this habit. Don't change watch ahead 15 minutes or lie to yourself about the time to get yourself to hurry. Mine scraps of time.
Every day has unavoidable delays, waits, and time between events.
Use these scraps of time for useful contemplation or work that can benefit you. Think about your day's plans or take out a pen and paper and rework your shopping day list. Take along a book to read. Scraps of time, mined for their benefit to you can accomplish useful work that you would otherwise have to do some other time. Mining scraps of time also reminds you that you control your use your time, not waiting rooms or lines.