We now know that willpower is a finite resource, and we only have so much willpower to go around.
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General Motors and you only have so much money to spend on marketing strategy, where are you going to spend it?
But Minnesotans only have so much to worry about on that front.
You only have so much mental energy, according to John Tierney and Roy Baumeister, authors of the book Willpower: Rediscovering the Greatest Human Strength, so use it on the right things.
Because let's face it: You can only have so many cases of foxes guarding the hen house until you know that contempt for women's sexual rights is threaded through the leadership as well as the rank and file.
So there are milestones along the way here, because we only have so many days between now and August 2nd to decide whether we are going to press forward and achieve a significant deficit reduction deal or not.
Some 60m acres, mostly in north India, are liable to flooding, of which only 23m have so far been protected by dams and embankments.
Homebuyers have only so much to pay toward a mortgage, insurance and taxes.
Is it because we have only so much listening in us, and so many very important things to tell our-selves?
Only political anoraks have so far taken any interest in the mechanics of selection procedures, and the casualties have been small fry.
Doctors can have only so many patients, lawyers only so many clients.
Only 30 candidates have so far been selected in the target seats but the process is expected to be completed by the summer.
But my dirty little secret is that I don't particularly enjoy birding in Central Park and have only done so once or twice.
Of over 2, 200 climbers who have made it to the top of the world's tallest peak since it was first conquered, only 19 have done so via this route.
The only reason you have so many people of Mexican ancestry living in cities like Los Angeles, Las Vegas, Phoenix, Denver or San Antonio is because, at some point in our family tree, there was a person, maybe a parent or grandparent, who was shut out from opportunity in Mexico and had to go north.
In any case, as we said, this is a short process you'll only have to undergo once, so the only thing that really matters is that you can get it to work.
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Successive British governments have not funded any astronaut activities, and so the only Britons to get into space so far have done so by becoming US citizens and joining the American space agency, or by getting on a private programme of some kind.
So far Romania is the only European country to have done so.
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Some 74% of U.S. employers already offer employee wellness programs, but these have had only a modest effect so far, because few employees have chosen to participate.
Only nine men have managed more than 200 tournament runs so far, and only two, Rohit Sharma and Chris Gayle, have a strike rate of 150 Gayle brought his to 170 on Tuesday with a monstrous innings of 175.
"We have only had six days on track so we still have work to do and things to learn about the new bike, but we are starting in good shape, " said the 31-year-old, with six MotoGP titles.
Of the large software firms, only Netscape and Corel have so far pledged full support.
The expectation was that we had six medal chances, but we have only delivered one so far.
Frankly, last night was amateur, a national embarrassment, and I cannot be the only person to have thought so.
He's the only player to have done so, the Rangers said when they signed him, citing the Elias Sports Bureau.
The only concern that I have so far is the names of the two roasts that are going to be released.
US-based Bree is the only Irish swimmer to have so far qualified for this year's Olympics but his place in Beijing is now in doubt.
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