I’ve been an EFL teach since 1996 and a teacher trainer since 2003. Before becoming an EFL teacher, I worked in the Civil Service and in a local post office.
To get the most out of the course, I’d advise you to keep organised: organise your handouts, plan when to do different pieces of coursework, don’t leave things to the last minute and set yourself a target for when to get your plans finished by. Also, try to take at least half an hour each day to do something non-CELTA.