Some might ask WHY? Why do I want to spend long hours preparing something for a lesson while in their opinion teaching English itself is enough. Honestly, such a question proves that the person I'm talking to isn't a (good) teacher. Sadly, sometimes in fact this question is asked by a person claiming to be the one. I had a chance to cooperate with people whose lessons were artificial, with no interpersonal contact and, what's even worse, left nothing in students' minds. To my mind such "teachers" should deeply revise their decision. No matter what you do, try to be professional and... happy. You spend most of your life working! I am lucky to say that I adore what I do. Teaching gives me energy, enthusiasm and satisfaction.