In my opinion, as teachers, it is important to always be up on current research, teaching procedures, and general information. Different ways of teaching are always being developed, and most importantly technology in the classroom is always changing. Just because you know powerpoint or simple windows programs doesn't cut it anymore. To be able to make the most of your classroom you need to learn many different technology methods and possibly unlearn the same old powerpoint lesson.
I found an awesome website/blog called The School of Unlearning. It gives a lot of different ideas to kind of test your brain, and also information on Learning to Unlearn. As younger teachers something we need to think about is the fact that we may be the ones trying to get our older co workers to unlearn and relearn with new technology, and if we're not even open to new things, how do we expect others to as well? Thats why, we must be open to Learn, Unlearn, and Relearn, because that is not an easy trait everyone has. It is something not only yourself can benefit from but your co-workers and students too. Every new school year you should be unlearning and relearning with students, and easing the transition so they are able to share this trait as well.