I would address the following topics:
the supreme importance for each nurse to be a continuing learner/student (nursing is changing daily)
The importance of taking care of yourself along with your patients because if you do not do this...then you will quickly burn out.
The importance of developing your common sense and intuition. Even are are best assessment skills sometimes are not good enough.
the importance of listening not only with your ears but also with your head. I think that alot of information is conveyed nonverbally and if you do not catch it you will be at a loss.