I advise you to read the mark scheme a little bit more in depth. Try to think of every single viewpoints you can think of in terms of the non-fiction paper. Build up your ideas as you go through the paper, the previous questions you may have done will help you with the big the question.
In terms of essay writing, avoid writing essays that are too abstract or overexaggerated. For example, don't say something like "I can see tall figurines of flesh waving towards me as I swim across the golden sea of society" if describing your day at the beach, since the reader will think you must have smoked 5kg of wed. If your grammar is crap (like mine), be very careful using high valued vocab. The examiners want you to correctly use the vocab. If you don't, you will look like a fool