I just finished up my first year in the ER after a residency. The main thing that I can think that will be helpful is to try and be open minded and humble as possible. In my experience there is a bit of an initiation to see if you can make the cut. When you get criticism, take it, learn from it and become better. I have made mistakes that I learned from to become a better nurse. If you have questions or are unsure about how to do something, ask, and if you still don't know ask again. Be a hands on person and a go getter. Show them you want to be part of the team and that you can be relied upon. Good luck! You have chosen a great speciality area!