Honestly, I know what I should do too, but my sleep is terrible. There isn't enough time in the day. I belong on a planet with 32 hour days. Sometimes I have been able to set up my schedule so that I can start the day a little bit later each night, eventually working a graveyard shift, sleeping the next day, taking a day off, and starting again the next week. We all have different circadian rhythms. The average person without external cues to tell them when it is night or day but going to bed when they are tired and getting up when they are ready will settle on about a 25 or 26 hour daily cycle. Some people have shorter cycles and some longer. When it is a problem that causes significant distress, it is called a circadian rhythm disorder. People who have trouble staying awake until bedtime and wake up too early have "advanced circadian rhythm disorder" and those who have trouble getting to bed or falling asleep at bedtime and feel like sleeping later than time to get up have "delayed circadian rhythm disorder." Circadian rhythm disorders can also cause depression. The best way to treat these disorders is natural light at appropriate times. A week of camping will reset your clock at least for a while. It works for me, and my circadian rhythm disorder is severe. Going outside in the morning for at least 20 minutes or more if you can will also help a lot for a delayed circadian rhythm, or going outside in the afternoon if you have advanced circadian rhythm. Light boxes are not quite as good but will also help. And all of the other sleep hygiene things still help too.