What is the best to approach the analysis of an unseen text?

Firstly, it is pivotal to understand that everybody sitting the exam is in the same boat as you; so relax, take a deep breath.

Keep in mind the amount of time you have to answer the question - do not compromise on this at all.

Read over the extract thoroughly, if you can then definitely do it twice. Whilst reading, if something stands out to you then just make sure you identify this in some way. A small tick next to the section is sufficient, but so is underlining it - whatever YOU are comfortable with.

Identify what type of extract it it; is it prose, or a poem, a soliloquy, is its purpose to argue or persuade? Knowing the form of the extract will make addressing the question with the right type of technique much easier!

Then read over the questions that are there for you to choose from. See whichever one caters to your thoughts the best; what sticks out to you. Remember to read the keyword within the question - the operative word, it will tell you how to direct your answer. 

Make a quick plan as to what links you can make between the extract ad the question; what can you use as evidence your argument, what is a good quote to include and so on. Spend no more than a few minutes on this, the plan will not get you marks - your writing will, but it will help focus you.

Start writing the answer, being sure to be succinct yet thorough, keep referring back to the question so that your writing does not become tangential. 

Have a strong introduction which just sets out your writing, three solid points, or maybe four slightly smaller ones, and then a conclusion including a judgment.