The order of the passover meal would have been important because of the way Jesus spoke, "This is my body." The disciples would have heard that to be very particular. He took from the passover meal, just what he wanted to represent his body and his blood. He did not just take any wine or any pastry from any meal.
Jesus' strategy for fighting against temptation then, is the same as it is now, "Watch and pray that you do not enter into temptation." I need that advice just like they did.
I do feel sorry for them. Their eyelids were heavy!