Need to ask a favor? Try your luck on Thursday. That's when people feel most agreeable, according to a Canadian study. Researchers, who tracked behaviors in people working at least 30 hours a week, found that we become more accommodating as the week progresses towards the weekend. By Friday, though, the compliant mood is over: We're in a rush to finish things. On Monday, it's back to business. Productivity peaks on Tuesday, but avoid touchy subjects on Wednesday, when people are most quarrelsome.

Do hash out your experience asking someone a favor on a Thursday!