Take Action with Your Emotion

What's the best way to convey emotion in writing? My rule of three here is be active, be figurative, and create an echo. When you're showing emotion, allow your readers to feel it by

showing characters act on emotion.

A character isn't just furious; "Garrett smashed the vase of flowers he'd purchased for Chloe until he had a pulp of glass and petals"

using figurative language
Like water dropped into hot oil, the words splattered inside her head. Resisting the urge to spit out something foul, Eve smiled just enough so one could see her grit her teeth.

emotionally charged objects, images, actions, events
When you want to show emotional change emotionally charge an object/action early on in the story, then repeat it throughout the story to show growth. Someone who lost a parent might have something from that parent s/he interacts with throughout the story. Try to write out of the crowd and make it something unique that you wouldn't expect--not a photo or a lock of hair, but a fishing lure, a napkin used to blot makeup, a the gummy ball of gel from the back of a price tag.
Hope this helps!