Different strategies or styles may go out of favor and then come back and you can run into trouble.

WSJ: How Are Mutual Funds and ETFs Rated?

The iPS cells, which have many of the same basic properties, do not raise the same ethical questions as embryonic stem cells because they come from skin or now fat cells that have been reprogrammed to go back in time, so to speak, and have the ability to turn into any other kind of cell in the body.

CNN: Study: Human fat yields multipurpose stem cells

Crossbench peer and chancellor of the University of the West of England Baroness Butler-Sloss said she was concerned that "Malaysian students who come to Bristol to do the bar vocational course or the solicitors course in order to go back and better run the rule of law in Malaysia" would be unable to study in the UK after the changes.

BBC: Student visa cuts 'will do enormous damage' - Labour

But as long as they had at least a gold credit card and a solid professional or civil-service job to go back to, they were free to come to Japan, to shop until they dropped.

ECONOMIST: The Chinese in Japan

Mr. Gould says that offering free services can work to entice new customers, but that owners should go a step further, handing out coupons or promotions to encourage customers to come back.

WSJ: On a Tight Budget? How to Land a Client

Look, I think two years in, if you look back historically, is a time in which people have come into government service at the beginning of an administration and leave to go back to academia, or business, or to retire, or go into other pursuits.

WHITEHOUSE: Press Briefing

The U.S. should request that he and the immediate family be allowed to come to the U.S. or go to a neutral country, and then decide whether they all wish to go back to Cuba or not.

FORBES: Fact and Comment