Using the right approach — even if the final answer is wrong. Writing down the correct formula gets you method marks. These are the most important marks to chase.

Correctly putting the right values into the formula. Even if you get the arithmetic wrong afterward, substitution marks are awarded.

Getting the correct final answer. These are worth less than method marks — never leave an answer blank just because you're unsure.

Always show your working. A correct answer with no working can get zero. Working with a wrong answer can get most of the marks. Write every step.