How do you respond to criticism at work?

If it is constructive criticism then take it and learn from if. It helps to write it down and come back to if as you may be a bit put off by the manner in which it was delivered or from whom it was given. If it isn't constructive criticism you should take it politely and analyze the way or reason one was giving the criticism (a bad day, frustrated with your performance...). There may be some validity to the criticism even if it is poorly given. Take heart but don't take it to heart.