Whether you're concerned about not having the respect of your peers or that a customer isn't calling you back because she's gone to a competitor, over-thinking the issue only serves to compound the worry. Instead, pretend you have what you want. Act as if your peers respect you or the customer is loyal. These may be fantasies, but what you're worrying about may be as well. It's better to stop the worry and act confidently; chances are better you'll get what you want.