Be a good role model. To earn respect, it's important to show that you know your stuff. People will respect and listen to you, if they know you are knowledgeable in your field.
Discuss your experience. Without showing off, let your employees understand how long you've been in the business and what you have achieved while you were there. Not only will they have a better understanding of why you're sitting in the boss' chair, but they'll be more excited to be a part of your team and will admire you.
Act professionally. Though you may be the boss, you should still be cordial to all of your employees. You should also still meet the basic standards of professionalism such as; dressing appropriately, coming to work and meetings on time, and communicating in a professional manner.
