1. Write a basic sentence

I walked to school.

1. Add a simple modifier

Carefully, I walked to school.

1. Add midlevel detail

With my backpack slung over my shoulder, I carefully walked to school.

1. Make it vivid

Quickly stepping out the front door, I slung my heavy backpack over my shoulder and carefully walked to school.

1. Make the first part more vivid

Before the sun had a chance to warm the morning air, I quickly stepped out the front door, slung my heavy backpack over my shoulder, and carefully walked to school.