I also read How to Give Feedback Without Sounding Like a Jerk. The title of it made me laugh, but it is so true. Whenever you give any type of feedback and it is not positive, they think you are out to get them. They explain in this article very nicely on how to deliver the notes you have without upsetting the other party. It is a nice refresher on etiquette and knowing how to not ruin a relationship with someone else by hurting their feelings.
Because instead of saying good job, we just give out cookies.

