Sleeping Well
Sleep is not a luxury — it is a biological necessity. The quality of your sleep directly determines the quality of your thinking, decision-making, emotional regulation, and physical health.
Why sleep matters for decisions
Section titled “Why sleep matters for decisions”During sleep, the brain consolidates memories, clears metabolic waste, and restores cognitive function. Sleep deprivation impairs:
- Judgment and risk assessment: Tired people systematically underestimate risk and overestimate their own performance.
- Emotional regulation: Poor sleep amplifies emotional reactivity and reduces empathy.
- Creativity and problem-solving: The sleeping brain makes connections that the waking brain misses.
- Attention and focus: Even mild sleep debt significantly reduces sustained attention.
How much sleep do you need?
Section titled “How much sleep do you need?”Most adults require 7–9 hours per night. Individual variation exists, but the idea that some people genuinely function well on 5–6 hours is largely a myth — most people who believe this are simply adapted to feeling tired and don’t know what well-rested feels like.
Practices for better sleep
Section titled “Practices for better sleep”Consistency
Section titled “Consistency”Go to bed and wake up at the same time every day — including weekends. Consistent timing anchors your circadian rhythm and dramatically improves sleep quality.
Light management
Section titled “Light management”- Get natural light in the morning: this sets your circadian clock.
- Reduce bright and blue light in the 1–2 hours before bed.
- Keep the bedroom dark during sleep.
Temperature
Section titled “Temperature”The body needs to drop its core temperature to initiate sleep. A cool bedroom (around 16–19°C) supports this process.
Wind-down routine
Section titled “Wind-down routine”Create a consistent pre-sleep routine that signals to your body that sleep is coming. This might include reading, light stretching, a warm bath, or calm conversation — but not screens, intense exercise, or stressful tasks.
Limit stimulants
Section titled “Limit stimulants”Caffeine has a half-life of 5–7 hours. A coffee at 3pm still has significant caffeine in your system at 10pm. Alcohol, while sedating initially, fragments sleep architecture and reduces sleep quality in the second half of the night.
Address anxiety
Section titled “Address anxiety”Racing thoughts at bedtime are one of the most common sleep disruptors. A brief journaling practice — writing down worries and tomorrow’s plan — can offload mental load and make it easier to settle.
When sleep is consistently poor
Section titled “When sleep is consistently poor”Chronic poor sleep warrants attention. Common causes include sleep apnea (especially if you snore or feel unrefreshed after a full night), anxiety or depression, poor sleep hygiene, or shift work. Consulting a doctor or sleep specialist is worthwhile if self-directed changes don’t help within a few weeks.