I started with RT, as it was being run as an evening course! Then AirLaw, as it's required, and Human Factors cos it's easy. I would leave Nav until you've done some, as a lot of what's in the book is soooo much easier to understand once you've done it. A/c Tech I left until last, as again you pick things up as you go along. Met I did in the middle, while the weather was too bad to do much flying. I actually found it really interesting :o