Where did my grapefruit go?

Mindful eating, take two.  Seriously, not three minutes ago I had just cut open a grapefruit and now it is gone.  Part of this is I was hungry, part of this was I just devoured it without thinking.  The same thing happened with my soup at lunch today (though I didn't eat all of the noodles, which was something of a triumph).  I think my problem right now is that I feel like I never have the time to pause to just eat, but I guess I should also factor in the time I'd save if I didn't worry so much about what I was eating.