1. You're not going to save the world so quit beating yourself up over the one(s) that got away.
2. You're not going to destroy the world so shake off the bad lesson/day/week/month—whatever. I've had to shake off a bad year—or three.
3. No matter how much time you put into developing the perfect assessment system, you'll rarely be surprised at what your kids can do. They show you every day—if you pay attention.
4. It is OK to smile before Christmas. In fact, the teachers who told you that are probably the reason your kids hate school.
5. Let 'em go to the bathroom.
6. You really don't have to spend 60-80 hours per week to be effective. It's tough to keep that pace up for a career.
7. Teachers:Admin::Students:Teachers. You see staff meetings the same way students see your class. How will you deal with that?
8. When dealing with staff, make few statements but ask lots of questions. Asking questions always works because they're fair. Sometimes you have to get people to actually verbalize their bad ideas before they see the fault in them.
9. Lighten up a little.
10. Not everything you try is going to work. So what? Keep trying; it sets a good example for your students.