But how many of us even spend one or two hours a week focusing on our portfolios?
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By modest challenge I mean successfully hacking the site within an hour versus five minutes or two hours.
DVDs could record up to six hours of television programmes against the miserly one or two hours offered by the current designs.
For example, you might consider a limit of one or two hours a day and, for a better night's sleep, no screen time in the hour before bed.
Having said that, we do know sleep is key: Teens need an average of one or two hours more sleep than their 9- and 10-year-old siblings, yet studies show most teens gets a few hours less.
Excluding the engine, where efficiency will reach Italian levels only when a new engine plant is opened, it takes around 21 man-hours to build a Palio in Betim, or about two hours more than it would at Melfi, the firm's most modern Italian plant.
Delta has also limited 50-seat flights to trips no longer than 700 miles, or under two hours.
The questioning could have been easily done in two or three hours, they told the judge.
You must stay hydrated, and staying in the gear longer than two or three hours really brings heat problems.
Unique to the company is a concept called ESPA Time, in which clients simply book two or more hours.
Two or three hours were needed to put the costume on, and as long to get it off again.
The savings in time may be more impressive, since the average household currently spends two or three hours a month paying bills.
One client spent two or three hours on cross-continent video conference calls trying to decide if they would try one 90 minute session .
It is better to dedicate two or three hours of intense focus to a skill than to spend eight hours of diffused concentration on it.
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As July wore on, the daily procession of ambulances dwindled to one or two every few hours, then ceased altogether a sign that the Okinawa battle was now history.
The nearly inevitable wait for dinner (two or three hours at prime time, unless you e-mail ahead for a reservation) is made more pleasant by a free kegger.
Also included in the package are a charger, an antenna and a 1500 mAh NiMH battery that promises up to two hours of talk or 36 hours of standby time.
So staff are less confident in their PE teaching abilities and there has been a steep drop in the numbers of children doing two or more hours exercise a week.
In the meantime, the dog stopped and sat on the sidewalk ten metres away, and Benny followed suit, sitting on the Memorial Park bench where Nava had apparently been two or three hours earlier.
All that changes within two or three hours of an animal emerging from hibernation, when a wave of new growth ensures that the number of synapses in the hippocampus soars beyond even pre-hibernation levels.
Delmonico favors calling the disorder hypersexuality, and notes that it isn't easy to diagnose: It takes at least two or three hours of discussion with a patient to determine if he or she is hypersexual.
Fujitsu reps said the current prototype is capable of lasting between two or three hours on a charge, though we imagine much longer battery life will be needed for it to become a practical, everyday solution.
You know, we would sit down for two or three hours, and you know, we just look at the photos and, you know, I'd get him to sort of tell me stories about them, sort of the players and who the people are in them.
With the help of Chiara Cirelli, who also works at the University of Wisconsin, Dr Tononi has created a mutant fruit fly that sleeps only two or three hours a night. (A normal fly sleeps between eight and 14 hours.) The mutation itself is in a gene for a nerve-cell protein of a type known as an ion channel.
People who work on computers or watch television for four or more hours a day are 125 percent more likely to suffer a major heart problem than those who spend two hours or less.
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'They would not have gotten there in two hours, four hours or six hours.
While specific exercise advice couldn't be drawn from this study, McClain refers to the government's physical activity guidelines that suggest getting at least five hours of moderate exercise or two-and-a-half hours of intensive exercise each week.
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