The problem is, by the time I decided how nice it would be to have such a list, there were so many items that should have been on it, that I couldn't possibly make it!
In the years since I am sure that I've learned many many new things. As an educator, every day is a new learning opportunity. In almost 20 years of teaching, that adds up to 3,600 learning opportunities. On many of those days I'm sure I learned more that one thing. What a list that would be!