Assuming you will work in IT, you will have to write DOCUMENTATION.
I am not talking about documenting your program. I am talking about USER DOCUMENTATION.
Assuming your user is dumber than a rock (my apologies to the Rock); you need to write a few pages telling the user EXACTLY what to do.
Pick something simple. It should have between 10 and 20 steps.
VERY BIG HINT: Use Spell and Grammar Check.