#35: A McDonald’s Hack
If you’re into getting free food, this hack might be for you. According to some people, McDonald’s has a policy of giving out free food. You can supposedly complain that your meal didn’t taste good, and they will whip up a replacement order for you completely free of charge. You don’t even need a receipt.

This seems like a pretty low-stakes hack. Go ahead and give it a try next time you still feel hungry after chowing down on a Big Mac. The worst that can happen is that the cashier says no. The best that can happen is that you get a whole second meal for the price of one. Seems like a pretty sweet hack.