When I’m designing a new offer, I will actually hold back on some bonus items. I won’t put them in the offer, nor will I talk about them during the sale. Then, sometime after the purchase, I will surprise my clients with the extra bonuses. Even the most grizzled customer is delighted to get something that wasn’t promised. In fact, it’s often shockingly easy to please them—you don’t have to get crazy when you’re sending extra goodies.