I'll try to make my instructions easy to scan, but also as specific as possible. Where appropriate, I'll include pictures that illustrate the steps. Here's an example of format I might use for an instruction page:
How to Change a Tire
Step 1: Pry off the wheel cover with the wrench and loosen the wheel nuts.
Step 2: Put the jack under the car.
Step 3: Use the wrench to jack the car until the wheel is about three inches off the ground.
Step 4: Remove the nuts, mount the spare, and thread the nuts back on by hand.
Step 5: Lower the car, remove the jack, and then use the wrench to fully tighten the wheel nuts.