Exaggerate what you know.
If you're late for 1st period one morning, and have to suffer consequences, imagine being in boot camp, also arriving late to some event.
If you're swamped with homework one day, imagine what it would be like to be a single mother with 3 kids, having to work 3 jobs, never getting any support from your husband or friends...
If you're feuding with a best friend, imagine if you were the king of one country battling with the king of another.
Just make something up and see where it takes you!