I love the discussions that books lead to, and I think expressing yourself to others through writing is as necessary as breathing. A. How to eat lunch in 5 minutes. B. How to get 5 minutes to eat lunch. I didn't decide to become a teacher until I was a junior in college, and I've never looked back. Thinking back on it, I can't imagine what took me so long to find out that this is where I belong.
Teaching is a vocation, a calling.
It is like being a physician, a parent or a priest. You have to live and breathe it, every moment of every day. It's an awesome responsibility, second only to parenthood, in my opinion. Also, teach what you love and show students your own enthusiasm for life and learning. Classroom management is always a challenge.