I personally think you can't easily force your own body clock into running against its natural state.
In your case, you struggle to get up earlier and motivated, so accept what you feel is natural to you and this will allow yourself to be more productive as you aren't wasting energy and will-power trying to be a morning person. I'd assume after a lot of training, its possible to change and for it to come naturally, but why bother?
I am useless at getting up early, and mornings are a productivity wasteland for me if I'm forced to get up so this is what I do.
I sleep when I'm tired, which is often around 3 to 4amish, and I wake up around 11ish, at which time I eat, read the papers and don't even attempt to do any work unless I feel really motivated to do some. My best hours for working are 10pm to about 4am. As for eating. I eat when I feel hungry and breakfast is always my biggest meal. I naturally seem to eat very little later on.
So, if you need to wake early for work or other commitments then keep training yourself using repitition and consistancy and I'm sure you will get the place you want to be, but if its not so critical, try simply listening to your own body.
Sleep when you're tired and eat when you're hungry!