My first practical experience

Wow, it's being a long time coming but I've finally secured my first 3 week practical teaching experience.  The principal of the school that has excepted me has being very supportive and seems generally interested in giving me the best learning experience possible.  I'm feeling very spoilt as I've heard some real horror stories from other students.  My prac doesn't start until mid-October which gives me five months to work myself up into a complete panic!!!  I think I will be watching this clip the night before to calm my nerves http://www.youtube.com/watch?v=iBaUYcZU7-w&feature=feedf
It offers some very simple, practical tips on how to approach the experience and what the school will expect.