Free pizza.

We've had a "scam" going with a local pizza chain ever since moving into our new house last year. Since it seems to work about 90% of the time, we're going to share it with the rest of you:
Call up the pizza joint and order a large, square deep-dish pizza, and, here's the key, ask for it to be "Chicago cut". "Square cut" works too. And be sure to get it for pickup (delivery won't work as well).
When you go to pick up the pizza, they'll check to see if it's "Chicago cut". Nine times out of ten the person making the pizza will just do their usual "round cut" on the square pizza without even noticing the special instructions, which creates a bunch of oddly-shaped pieces. At this point you can either choose to have them remake it correctly, which takes seven minutes, at which time you'll get two pizzas for the price of one; or, you can just ask for a coupon for a free one for next time. We bring the coupon for a free one along every time we go for the pickup, but almost never have to use it, as the pizza is always cut incorrectly. We've literally gotten at least a dozen free pizzas this year.

You probably already know which chain this is, but if not feel free to email us directly.