Hi,
As for advice, you should thoroughly check your notes, read them often enough to become familiar with the information. Past papers enable you to test how much you actually know. However, most of the time people think that they know it all, but half of the time you don't. Trust me, been there done that. Im not sure about this international boards though. Anyways, Good luck
As levels currently studying: Biology,Chemistry,Psychology,English,Edexcel exam boards
Sana