The Federal Trade Commission yesterday said that companies engaging in word-of-mouth marketing, in which people are compensated to promote products to their peers, must disclose those relationships.	Former Enron chief executive Jeffrey K. Skilling received at least a brief reprieve from prison yesterday after a federal appeals court said it needed more time to consider whether he should remain free pending appeal.	The Post's Amy Joyce offers advice about gracefully managing interpersonal issues on the job.
Sales of existing homes are expected to decline 8.6 percent, to 6.47 million, for 2006, and shrink another 1 percent, to 6.40 million units, next year.	Valassis Communications is suing to escape its deal to purchase Advo, a direct mail marketing company it agreed to buy for $1.3 billion.	Fewer people are rushing to cram in miles before the end of the year to upgrade to a higher frequent-flier status.