Mirror: https://web.archive.org/web/20210217073350/https://supermemo... +1 to not using an alarm clock. I trust the years of evolution that the human body has tuned in figuring out how much to sleep.
Mirror: https://web.archive.org/web/20210217073350/https://supermemo... +1 to not using an alarm clock. I trust the years of evolution that the human body has tuned in figuring out how much to sleep.