The best advise I can give you, or anyone else, on this matter is that you shouldn't make your essays so structured and 'formal' that they come off as robotic.

Remember, the whole purpose of an essay is to entertain the reader. You can do that by expressing (even your mediocre) ideas in flowery language or you may add some interesting notions and what not.

I see that a lot of people are worried about the facts that their essays would contain, how they would almost chronologically go from point A to point Z and how they'd give it a proper structure. That's not a very good approach. Fine, you'll pass but you won't get more than 50-60 marks.

Read essays in Time magazine, Dawn, Images, etc. They don't employ the tools that we're made to use and their essays are infinitely more interesting.

If the examiner is entertained, and at the same time convinced by your reasoning, he will give you good marks. If you bore him, he'll pass you but don't expect excellent marks.

__________________
He conquers who endures.