My teenage son has been staying up until one and two in the morning to finish his homework , and then falling asleep in class the next day.. Thank goodness he recently came up with a possible fix: SelfControl, a free app he has installed on his computer.

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His party looks in chaos from the outside, so goodness knows what is going on behind closed doors.

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But in the end, he is defined by his potential for goodness rather than by his selfish pursuit of greatness.

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One reason is that even in ultra-religious South Carolina Mr Inglis's hair-shirt goodness (rather than rent an apartment, he sleeps on an inflatable mattress in his Washington office) can seem a trifle cloying, even unconvincing.

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