Audio Supplements
Way back when, I purchased some Audio training CDs from the transair website. These worked well to supplement the reading I was already doing. The costed in all about £10 per subject. I just whacked them on my ipod and everytime I went out for a jog, or on my drive to work, i'd listen to them.
Theyre about an hour long, but I cannot stress enough that they should only supplement your reading and already existing revision techniques.
I also bought an AFE PPL book, full of practice questions for each subject.
Ive still got a few exams to go though!
Happy Landings.