Food and kilometers

Whenever the day comes before a multi-day trek, the same problem always arises: food. I think I have a fair amount of experience in preparing what I need for a trek in total (or almost total) autonomy, yet I am faced with the usual questions: Will I have enough, or will I have to ration? Will I have to curb my hunger, or will I come home annoyed by those three leftover energy bars? Food is, almost…