My technique:
AFE books
1 subject at a time
first read and underline important things of subject
do the revision question at the end of each chapter
then re read quickly the whole subject
do the 3 papers of the "confuser" book (they are the same as the real ones
then do the test
It all worked fine for me (I have to say that I am an aeronautical engineer though and a sailplane pilot, so that helped a lot)
cheers