You are telling a story. Your story needs a beginning, a middle and an end. Write it like you would say it if you were telling your best friend!
Your story needs to catch the reader's attention. Give it catchy beginning. Use exclamations, actions, dialogue, a when, a where or describe a character or setting.
To keep the reader's attention use language that helps them make a picture in their own mind.
Use strong verbs and adjectives!
Use figurative language - similes, idioms, hyperbole are the easiest to come up with.
Finish up with a strong ending, describe a feeling or memory, explain about a lesson that was learned. Be original, be creative.