2. Don’t say "It’s not my fault":

Whenever, you think your work has gone wrong don’t end up in saying that it was not your fault or you were not responsible for that because taking responsibility of some task will help you to be more responsible. It’s also one of the elements which have the ability to set apart successful employees from unsuccessful employees. Don’t blame others for your mistakes instead you can spend your precious time in finding solutions for the problem.

3. "I can’t work with this employee anymore":

In your professional life never ever use this term of saying you can’t work with an employee who you feel it’s not comfortable working with him or her. This attitude of yours can damage your professional life as the word communication is very important to survive in your career.  It is always advisable that even if you feel your co-worker is irritating you, you must avoid saying it to your boss because he or she may think that you are unfit to work with a working atmosphere where there are people with different behaviors.