[xsace]

if you want to wake up early eat very early dinners.

Have a full breakfast to avoid sleeping during the day

Those 2 facts seem conflicting to me. In one case food deprivation helps you wake up while the other case it would make you feel asleep?

[dimitar]

It is an interesting question (so I up-voted it), but they are not conflicting since it doesn't happen at the some.

I don't think it is really food deprivation - any healthy human being should be able to go 16 hours between meals once in a while (assuming regular meals most of the time). When you wake up you do wake up hungry, but you don't feel impaired yet.

Food deprivation may start after that - so you might get lethargic and sleepy because of it.

[abstractbeliefs]

It seems more like "Having food in you keeps you awake" - so a big breakfast will keep you running until the afternoon, and an early dinner will mean the tanks less full when you want to sleep.