Just finished all my exams, all I can recomend is doing past papers and past questions loads, they do help a lot! Find some on the net etc, because when you do a past paper and there is a question in it you don't know look it up in the book and write it down. Also I found personally if I need to memorize a formula or a word or something I paint a picture in my head, usually its unusual if you know what i mean it sticks in easily. For example for the Kinetic energy formula I imagine an old woman on a bike I mentally slice her in half (her mass) then I image her peddling the bike real fast so her speed is squared. Therefore KE= 0.5 x mass x speed squared.