Need some help on AS Chemistry Edexcel so hard to revise!!

What i do is read my revision guide highlight relevent points according to the specification and then i write the notes  on colourful paper or with coloured pens because the brain remember things better that way. i dont revise from the edexcel chemistry book as there are a few mistakes and it contains a lot of irrelevant information, and after you finish your revision start doing practise papers, LOADS of them.