A few things to think about.
No matter how well you perform your job there are times when you will be criticized. You may also find yourself in a position where it is necessary to criticize the work of someone else. Criticism, when offered correctly, can be extremely beneficial, but only if you are open to receiving it. I can think of quite a few times in my life where constructive criticism has improved my performance.
Today I read an article in Business Week, "How to Give and Receive Criticism", that discusses what criticism is and is not, and the best ways to give and receive. It's a good article, give it a read.
Happy Friday!
-Brianna