Teaching and training is firstly about preparation before delivering a course. Preparation includes the choice of content, deciding on appropriate teaching methods and putting them into a sequence to maximise the effectiveness and impact of your training. Secondly, teaching is about delivering a course (i.e., how you act and interact with the participants). Even if you are feeling very confident on a particular topic, it is very advisable to avoid starting the delivery before having finished the preparation. Moreover, you may need to test your content, especially the practical exercises. Then, during the course delivery, you need a good portion of flexibility, because things rarely happen completely as you expect. Finally, teaching is also about evaluation and self-assessment once you have delivered a course. It is more than likely that you have to engage yourself in the same or a similar course several times, in particular if the evaluation shows that it was good.