Make it realistic
Take some time to listen to everyday conversation around you. Become aware of phrasing, pauses, actions and everything else we do without thinking when conversing with others. To research this more consider listening to radio or audio plays
Read it aloud
This is perhaps the most important dialogue writing tip of all - always, always, always read dialogue aloud to see if it sounds authentic.
Formatting Dialogue Tips
When you’re physically writing dialogue there are certain rules that it’s necessary to stick to.
• Start a new line when a new person starts speaking.
• Dialogue needs to be typed in inverted commas, pick either double (“) or single (‘), but whichever you choose be consistent with them.
• Internal/inner dialogue (thinking) does not need to be in inverted commas.
• Remember to show who is speaking, it needn’t be a ‘he said’ or a ‘she said’, an action works just as well providing we are told who is doing it.
• During a discussion include a name of who is speaking after every five to six pieces of dialogue otherwise the reader may find themselves counting back to find out who actually said what.
• Avoid tags to your dialogue like ‘he laughed’ and ‘he smirked’. In reality words are always said never laughed or smirked.
• Dialogue is always stronger if it has a sentence to itself rather then being slipped into the middle of sentence.