I was born in Australia but grew up in England controlling the cost of prescription drugs Indeed, some hagglers drill down even further. "I believe the best day to negotiate anything, from an insurance claim to a salary raise, is the Friday before a three-day long weekend," says Yeager, who signs all his publishing contracts on Fridays. "Think about it. The last thing people want to do is spoil their own weekend, by leaving stuff unresolved."