Use onomatopoeia to make your writing pop

Susie knocked – thunk thunk thunk – on the door. After a few moments it opened with a creeeaakk...

‘Susie Thirskiss, I assume? Salutations,’ hissed a lisping voice.

‘Uh... I... Uh...’ stu-uttered Susie. From inside the house, she could hear a metallic clanking clatter. ‘I don’t know if–’ CLUNK ‘–I have the right–’ CLUNK ‘–address,’ she said.

The man behind the door coughed out a low, rasping laugh – kakh kakh kakh – and grinned. He waved a hand in front of him – swooosh!

‘This address,’ he said, with a twinkle in his eye (blingadingading), ‘is always the right address.’

Susie’s heart had been beating fast – badabump badabump – but now it sank – psheeeeeeew – as she realised – ding! – the horrible truth – RAAAAAAGH!