Staying up late at night watching TV, goofing off or drinking might be fun at the time, but leads to excessive tiredness during classes.

熬夜看电视或者酗酒这只能得一时之快，它们带来的只会是无尽的疲劳与困倦。

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Get enough sleep Staying up late at night watching TV, goofing off or drinking might be fun at the time, but leads to excessive tiredness during classes.

充足的睡眠熬夜看电视或者酗酒这只能得一时之快，它们带来的只会是无尽的疲劳与困倦。

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If you start to feel any of the symptoms of burnout - excessive tiredness, distraction, lack of interest, a vague sense of futility -immediately take corrective action.

过度疲劳、精神涣散、兴趣缺乏，一种恍惚的无力挫败感——如果你有了其中任何一种倦怠的症状，要马上采取修正的行动。

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Additionally, the "Ecstasy hangover" - feelings of excessive tiredness and irritability, alongside an inability to think clearly - is thought to be caused by an over-depletion of the chemical as the drug ceases to have an effect.

BBC: Ecstasy