Show Instead Of Tell:
1. Describe things using different senses, rather than just sight. Smell, in particular, can really bring a scene to life.
... 3. Make sure your beats are original, and try and build a character’s personality rather than just their mood at the time. e.g. A character biting their nails will show they’re anxious, but it’s a cliché. What other nervous traits would build that character? i.e. If they’re a writer, their nervous tick could be to compulsively tap their pen against their desk.
... 6. If you must convey a piece of information through dialogue or thoughts, make sure you're at least showing something, by using words which build character or voice.
... 12. Don't forget to check for situations where showing may not be necessary. e.g. it’s dull, irrelevant, or would be much simpler as a tell.