3. Not accepting your mistakes: Everyone in this world is liable to make mistakes, as no one is hundred percent perfect. Therefore, it is always advisable for you to accept your mistakes and try to fix it in the best possible way in your workplace. If you do not accept your mistakes done while handling any project, you are sure to make your boss angry, who may in turn fire you from your job. So, in order to play safe accept and apologize for your mistakes and try to work on them.