I’ve often stressed that just reading your notes, and even highlighting the important parts, is not enough if you want to revise effectively: you must revise actively and the more you do to process information, the better your revision will be.
Instead of highlighting important facts, write summary notes; better still, connect the important points together using a mind-map or spider diagram.
You must practise recalling information – and you must repeat all of this regularly, especially for the topics where you feel less confident.
And test yourself, or test each other. Work your way through as many past papers and revision-guide questions as you can.
There is more advice about how to study effectively, including the importance of having a comfortable place where you can work uninterrupted, on The Student Room website. I’ve included the bullet-points below but I strongly recommend that you find 15 minutes to read the full article, which you can access here.
Mr Tarrant's physbang 'blog 