I found that if I set two independent alarms (i.e. my phone and my alarm clock), I sleep much more soundly when I need to get up early -- the second alarm gives

I found that if I set two independent alarms (i.e. my phone and my alarm clock), I sleep much more soundly when I need to get up early -- the second alarm gives me reassurance that I won't oversleep even if my phone battery dies so I sleep better