Don't Hog All The Credit
Insecure managers hog the credit for a job well done. Or, they hide the credit and don't give credit where credit is due. These managers are afraid to let their employees be in the limelight.
Secure and successful managers talk up their employees, highlighting the good performance they've done, and are eager to give credit where credit is due. They promote their staff to their supervisor and to others within their organization.
Successful managers know that they look good when their employees look good.
Giving credit where credit is due is a sign of a manager who is wise and confident. It's a sign of a manager who demonstrates good leadership skills. So, when your employees excel, allow them to take the spotlight.