"Well rested" is a myth. JK — it just feels pretty mythical. If you can wake up however early your obligations require and make it through the day without a nap, excessive caffeine, or a major slump in productivity, then you're doing pretty well. Don't assume that you should never ever feel tired, though. Feeling tired at the end of the day is totally normal, and hormones, exercise, stress, diet, medications, and loads of other factors may also play a role.