Many of you are probably in the same boat as me and unsure whether or not to bring in a self-made bound reference, or just carry in the textbook. Can anyone give me an indication of what to put into it? I've heard of some people putting in the past few years exam papers... i dont know if thats any good cos they aren't gonna repeat questions

And does anyone actually use their bound reference in the exam? or is it just a waste of time to make it, cos if you're gonna do well in the exam, you'll know everything in the book you make anyway? If anyones got a list of stuff to put into it, please post it here
cheers!
edit: also, im worried that when i make my bound reference and take it into the exam instead of the textbook, that im gonna forget to put something in, or that the exam has something the textbook has and my notes doesnt. then im screwed D: