I passed Air Law about a month ago - I found a combination of reading/reading again/taking notes/learning notes then using the AFE Question & Answer Simplifier worked for me - the questions and format in this book were VERY similar to many of those in the actual exam. I didn't book myself in for the exam in advance - just decided to do it after a lesson - that way I didn't give myself time to get myself worked up about doing it.
What I found helped me to remember it all (once I'd done the reading) was to test myself again and again using the practice questions in the text book, the q&a book and I also used pplquiz.co.uk. Also speak to your instructor - mine gave me a couple of mock papers to practice with aswell.
Good luck!