Never make the mistake of thinking that you have your teaching skills perfected. Try to be aware of what other educators are doing--either people you work with or people you hear or read about.
One of the biggest mistakes you can make as a teacher is to refuse to even try anything new because you are afraid of change.
You may even be teacher of the year, but I guarantee you that there is somebody out there doing something better than you. Be open to learning. Don't let yourself get set in your ways. Be open to the possibility of changing. Don't get cocky.
Your students will be the ones who benefit.