Key Takeaways

1. Consistent sleep and wake times (even on weekends) regulate your circadian rhythm, reducing time to fall asleep by up to 23 minutes in clinical trials.
2. Keeping your bedroom between 60-67°F (15.6-19.4°C) optimizes core body temperature drop, which is required to fall and stay asleep.
3. Cutting off blue light exposure 90 minutes before bed can increase melatonin production by up to 50% compared to using devices before sleep.
4. Most adults require 7-9 hours of quality sleep nightly; consistently getting less than 6 hours increases your risk of type 2 diabetes by 24% and heart disease by 15%.
5. Natural sleep hygiene interventions take 4-6 weeks to produce full results, so you need to track progress consistently rather than expecting immediate changes.
6. Chronic insomnia (trouble sleeping 3+ nights per week for 3+ months) requires evaluation from a sleep specialist, as it can be a symptom of underlying conditions like sleep apnea or anxiety.
7. Caffeine consumed even 6 hours before bed can reduce total sleep time by 1 hour and significantly lower sleep quality, so it is best to avoid all caffeinated products after 2 PM.