I think it depends on how you define &#x27;consistent&#x27;. A schedule where I go to sleep at the same time every day doesn&#x27;t work for me and never has - it&#x27;s precisely <i>that</i> which turns me into a walking zombie, as I&#x27;ve been for most of my time in high school.<p>Instead, I generally just go to sleep when I&#x27;m tired and wake up naturally when I&#x27;m done sleeping. This automatically falls into a pattern where my bedtime shifts forward by 1-2 hours a day, in a cycle. Whenever I can follow that pattern, I sleep and perform extremely well.<p>Different people still do appear to have different optimal sleeping patterns.