take a bath , first with warm water and then with cold water, u will be relaxed

drink a warm glass of milk,

sleep on ur side,

dont keep ur hand on ur head, that smooths the flow of ur thought, and if u want to sleep u dont want to think,

above will help in insomnia, but lack of sleep due to too much excitement is normal,
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i want to learn until i die, if u have some knowledge then share it with me.
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