(1) Taking advantage of the fact that the setters of the exam have been told to write structured questions.
Suppose that you are doing a question which is structured as follows:
Qu.3(a)
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(b)
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(c) (i) ------------------------------------
(ii) --------------------------------------
But you can’t work out how to do the last part. What hints do you have?
The setters of your exam were told to produce structured questions – more or less on one topic. If they offer to the chief examiner a question which hops around too much, from one topic to another, they are given back the question, to make it more structured. You can take advantage of this. The reason the question is broken into (a), (b), and (c), is because there is a bit of a change of topic from one part to the next. But when part (c) is broken into two parts, the chances are that the two parts are very closely connected. So your default assumption is that part (ii) has a lot to do with part (i). So stop thinking about part (ii); instead look carefully at part (i).
For example, if part (i) was about sound waves diffracting out of the end of a loud-hailer, then part (ii), which seems to be about a different person using the loud-hailer, is very likely to also be about diffracting.