French GCSE exam AQA in less than 2 weeksWatch
I did my French GCSE last year, and am currently doing A-Level, so I hope I know what I'm talking about.
I agree, do loads of past papers - especially the listening. Get used to hearing French being spoken at you, through past listening papers in your revision or through songs and the such like on YouTube (I also find that songs can give you a broader range of vocabulary.)
Regarding vocabulary, it's good to revise the stuff in the book, but branch out a little too. By that I mean, learn synonyms for some of the vocabulary. I can guarantee you that they will most probably use synonyms in the exam, because, hey, life clearly isn't hard enough.
If you're feeling really ambitious, try to find some articles in French to read (here a dictionary or Wordreference might help.). I know it sounds difficult, but my French teacher does it, and it really helps make the exams feel that bit easier because you know that you can read to a standard that's just above what they're asking you to do.
The classic post-it notes on everything is clichéd for a reason - it works. I can still remember a lot of my friend's German GCSE words because they were posted all over her house when I went to stay. Try it - it might work for you.
I hope I've been some help!