We're told to 'get eight hours, go to bed early, avoid screens'. The reality is finer: chronotype, caffeine half-life, paradoxical melatonin, alcohol as false friend, 3-4am awakenings. Ten questions, a few traps, little moralising. Three levels: common myths, orders of magnitude that mislead intuition, and the nuances magazine sleep tips ignore. Sources: AASM, Cochrane. See our terms and conditions. The information shared here does not replace advice from a qualified health professional.