Everyone has their own individual writing style

Writing
The ‘actual writing’-bit can be the most daunting and stressful part of the essay process, and is where most students get stuck. Here are some tried-and-tested solutions to common writing problems:
I can’t get started

Writers’ block
It’s quite common to want your first sentence to be arresting, paradigm-shifting, to propel your reader headlong into your essay. However, this desire can be paralyzing: one of the most stressful feelings in the world is that of staring at a blank page, thinking about the number of words you’ll need to fill it all up. The key to getting started is to just write something. Don’t worry about how good it is – get it down, and move on, and come back and change it when you’re well into your flow.
Go back to your plan and make sure you know what you’re arguing. If you still can’t get the words out, try and write down what you want to say as simply as possible. Then move on to an easier section of the essay. Alternatively, you can try going for a walk, making a cup of tea or having a break.
It all feels a bit wrong…
Sometimes, in the process of writing, you’ll realize that you entirely disagree with two-days-ago you, and you don’t really believe in the argument you’re trying to make. If it is the case, go back to the drawing board. Don’t plow on regardless – a lack of conviction will show in your essay. Return to your plan, and see if you can use similar material but change the emphasis, and perhaps the odd bit of evidence, to produce a different argument.
Style
Everyone has their own individual writing style: you might be as purple and flowery, or scientific and direct as you like (within reason). However you write, to get top marks, it’s crucial that you learn to be precise.
The boring stuff Style-wise, there are two poles of wrongness: vagueness, and over-complication. Of course, every subject has its particular vocabulary, and learning this will be crucial, and sharpen your analysis; but remember that little words are your friends too! Make sure that you know the exact meaning of each word you use. Crucially, make sure you know exactly what each word you’re using means, and think carefully about whether you’re applying it in the right context – remember that whoever is reading your essay will know better than you the meanings of zeugma, stagflation or symbiosis. Finally, don’t hide behind subject-specific vocabulary: make sure that you’re using terms to contribute to and develop your essay, and nothing of the flow is lost.
– Get good at conventions like footnoting, and writing bibliographies. Examiners really do check these!
– When you’ve finished, leave the essay for a day or two, and then re-read it. If possible, get someone to proofread for you. This way, you’ll avoid making lots of silly mistakes that threaten the clarity and flow of your essay.