Alarms are “external irritants” that make you wake up. When wake up alarm goes off, your mind wakes up
but your internal organs keep “sleeping” for some more time. How you can wake
up “from the inside”?
Put a glass of water near alarm clock (make sure to
put an alarm clock far enough from your bed)
and drink the water first thing as you wake up.
Very likely you’ll want to visit a bathroom next, but even if you don’t -- one glass of water
is usually enough to awaken your body. What many people do once they get up? They turn on
their coffee maker and few minutes later drink a cup of coffee. This has in general the same
effect, though in this case it’s strengthened by coffee’s energizing properties. Why glass
of water is a better trick for waking up from inside? First, it’s immediate – you don’t have
to wait as with coffee (you can fall asleep waiting!), and second, water is
healthier. 
