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Furthermore, our circadian cycle influences these neurochemicals, with dopamine and norepinephrine dominating in the morning, fostering alertness and motivation. As the day progresses into evening, serotonin levels rise, which can alter our perception of time and our mental state. This neurochemical fluctuation informs practical recommendations for structuring our day; for example, tackling important or challenging tasks early when dopamine levels are higher can improve perceived performance and motivation.