@MonetaryDread: First write a plan for each essay. If worst comes to worst and you don't get one finished you can still score points based off a plan. If the examiner can clearly see you were going to put in all the right information you can get a point or two I think. That's they told us at university anyway.
Never completely skip a question. Even bullet pointing some things quickly in 5 minutes will earn a few marks.
Intro: just rewrite the question in your own words e.g. If the question is "Ice cream is amazing. Discuss" Just write like "in this essay I will discuss why ice cream is so goddamn amazing. I wall talk about bla, bla and bla"
Bulk: spend a paragraph on each reason, once you have made your point move on! Also remember to give some different opinions too, not everyone thinks ice cream is amazing!
Conclusion: wrap it up. "Ice cream is amazing because bla, bla and bla