Giving appreciated assets isn't so useful a strategy, however, if your grandkids are younger.
Since then it has been clear that defamation suits are too useful a tool for the ruling party to give up.
Sony even admits that the Double Density CD-ROM is a product of the moment that will become about as useful a piece of computer hardware as grandma's sewing machine as soon as read-write capable DVDs are widely available.
My second shot travels 10 yards, a useful gain on a football field but not on a par-five.
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Rather, it means that an appreciation for the methods of science is a useful asset for a responsible citizenry.
Quite a useful occurrence for a show facing a building advertising boycott.
Such clusters give firms a useful advantage in a productivity-obsessed, cost-conscious world.
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Instead, they present Turkey as a useful bridge, a regional force for peace, and the model of a democracy that is compatible with Islam.
Governments can play a useful role or a harmful one, depending upon their attitude to companies, says David Arkless of Manpower, an employment-services firm.
But the Yankees were at least interested in bringing back Ibanez, who would be a useful piece as a designated hitter against right-handed pitchers.
This is a useful step towards a more market-based credit system.
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Others think that it could play a useful role as a lender of last resort, providing governments with short-term loans to tide them over a temporary crisis.
Bankinter, a Spanish bank, developed data-mining techniques to such an extent that it has been able to set up a useful business as a private detective agency for suspicious spouses.
In my view, making the systemic risk rationale for guidances and reviews more explicit is certainly feasible and would be a useful step toward a more systemic orientation for financial regulation and supervision.
Agile development has a useful concept called a spike: a small experiment done to prove something a developer has never done before to understand the full scope of a certain type of feature.
Because the operators do not need to keep pointing a laser at the target, they can fire several missiles in quick succession a useful feature if a ship is being attacked by a swarm of boats.
But Lib Dem peer and Justice Minister Lord McNally said he believed that it "could be possible to devise a system of enfranchisement of some prisoners that could play a useful part in a rehabilitation process".
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"To get a useful computer it needs to be probably a million times more complex, so a full-scale useful factoring machine is still at least two decades away, " he said.
There are a number of mistakes when calculating the probability of a traffic news report being useful to a motorist.
As a purely practical matter, two small bathrooms are better than one large one and a third bedroom is more useful than a master suite.
Let your friends and contacts know, for example, if you just attended a full-day seminar on a topic that would be useful to a future employer, post an interesting article related to your field, or add new skills or relevant experience to your profile.
Not a lot of news, but clearly a focus on making LinkedIn more useful on a daily basis, rather than just an online rolodex and resume.
Mr Nilekani's volume would provide a useful text for such a new lunar society.
But it is still a useful vote bank in a very close election.
The aircraft will also need to carry a useful payload a miniature video camera and a transmitter to send the signal.
This new device could be a useful tool, providing a convenient way for children to stay in touch with their family.
We've had a very useful discussion about a wide range of issues.
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According to Ed Waugh, who designed the electronics for the water sampling device, the trials are "a useful way of getting a feel for the task".
The sending of a fax message provides a useful analogy: before a fax reaches its destination there is maximum uncertainty, which decreases with the arrival of each legible letter.
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