Collect common proverbs, adages, favorite quotes, or one-liners. Change them in some small way and write about it for 5 or 10 minutes.
A penny saved is a penny earned.
A penny saved is a penny spent, unless you leave it with the cashier, in which case you haven't spent it, you've given it away. But if you didn't leave it with the cashier, if you put it in your pocket what then? What can a penny buy? Nothing that I know of, not these days. So why bother saving them? You'd have to save at least a hundred to be able to buy much of anything. And by the time you've saved up a hundred pennies, well then...you have a dollar. And a dollar can sometimes sound a lot, so you may as well save it. So then we go back to old Ben Frank's original adage. Yes...a penny save can indeed be a penny earned. But is it worth it? That's up to you.