@Felix Küppers Due to my profession I've had to learn how to reset my sleep schedule on demand. Here's what gets you 90% there: 1. Remove late night screen-time 2-3 hours before your desired going-to-bed time 2. Get out in the sun early as soon as you wake up. No windows, straight to the face sun exposure 3. Be physically active early during the day Bonus: Figure out your chronotype to determine what a good waking up/falling asleep time is for you. (Bear, Lion, Wolf or Dolphin). You can probably intuit it relatively well. First 3 days always suck. Get over it. PS - as with most things, most advice & hacks is complete BS. The things above are the only ones that have worked consistently for me