How do I write a good PEEL paragraph?

The most important factor in a great PEEL paragraph is to remember to ALWAYS answer the question. Don't answer a question you'd planned or written already, or a question you wish you'd been asked. Always answer exactly what the examiner is asking you. Your point should be one aspect of a wider argument, which directly answers your question. You should have exact quotes from the text which back this up. Don't try and learn reams and reams of long quotations - go for some short, snappy ones which can be used for several themes. Then explain and analyse this quote - pick out linguistic features, like alliteration, hyperbole or onomatopoeia, and then explain why this quote is important. Why have you picked it? Why does it prove your point? What fundamental themes does it illustrate? Then, link it back to your initial point sentence, and to the question as a whole. This last aspect is one that students often forget. Always write as if you have an examiner constantly going 'yeah, but so what?' in your ear. Make it completely clear to the examiner why you've written what you've written, and why its important.
Its important to include all aspects of PEEL to ensure you're hitting all the mark scheme targets, and to ensure that you're crafting a well rounded argument.