YES Erin is so right-- the easiest and most natural way is to let your body wake when it's ready. Your body has a natural rhythm that will get you out of bed and make you wide awake and bright eyed and busy tailed in the morning.
When everything is on track, sleep, diet, exercise, there's a natural super energizing rush that I get in the morning as soon as I wake up.. the positive one (not that panicky one that comes if I ever have to use an alarm)!
(that also solves the problem of incomplete dreams. tropicality, your subconsious is probably 'right' in wanting to continue your dream. I find it very disruptive to ever have 'incomplete' dreams, if I ever have to wake before the dream cycle is over-- it's like the universe wants to complete its transmission to your brain, and you want to get the whole story, before you wake up... it's very important to get the whole message!
)