I thought I would squeeze in some last minute Higher prelim advice to add to what's been said before.
Paper1: At the History in-service day last Tuesday, it was emphasised that pupils should try to write argument driven essays. What that means for you guys at TGS is kind of like turning the P.E.E. backwards so that your paragraph starts with the Evaluation/argument and elaborates/explains the point/factor being mentioned. Now, you may not want to try this at this stage, but the advice about the essay being more about the argument/judgement/analysis still applies - and I've been saying that from day 1. Your essay should be argument driven.
Paper 2: When tackling the 'How Useful' question, you should always explain why the Provenance may or may not be useful in tackling the question; you should always explain why the Content may or may not be useful in tackling the question; you should always explain why the Recall you are supplying may be useful in tackling the question. Yes, it gets repetitive but that's what the SQA want to see. So for example, This extract from the source is useful as it explains quite clearly why the Irish left Ireland. The source is limited in its uesefulness because the author seems to have limited knowledge regarding Jews..'
It's OK, and in fact you could argue advisable, to tackle the two 10 mark questions first.
Apart from these points, all previous classroom advice holds and is up to date. Good luck.