Jacobs experimented with cutting sugar out of his diet and did fairly well except for one item he found almost impossible to dispose of entirely: dried mangoes. "My willpower is failing me here," he wrote. Finally, he hit on an odd strategy using a form of negative motivation. He made a request of his wife: "'If I have another dried mango this month, I want you to donate a thousand dollars of my money to the American Nazi Party,'" Jacobs told her. He said it worked. "I haven't eaten a dried mango in two weeks," he wrote.
