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Second amended edition.
The book explains why sleep is crucial for memory, emotions, immunity and health, and warns that a chronic lack of sleep increases the risk of illness, accidents and poorer learning.
Help for everyone taking tests.
In addition to the many decisions we make throughout life, three are the most important, the most significant, the most fateful and the most influential. They should be among the first, in that order, to be resolved in the life of each person.
True self-mastery is not a fight against oneself, but a wise cooperation with one's own nature — by knowing the brain, body, and psychological laws, one achieves greater inner freedom, peace, and effectiveness in life.