Adequate rest is essential to clear thinking. Take time and care in preparing your appearance. Shine your shoes. Make certain clothing is wrinkle-free. Always groom your hair.
Extra attention goes a long way here.
Allow plenty of time to prepare yourself before your meeting. Even allowing yourself an extra five minutes can mean a big difference when it comes to presenting a calm and confident demeanor. Practice shaking hands. Practice on a friend. A firm, but friendly handshake is what we're going for.