I kicked whatever 'addiction' I had to soft drink a month or so ago on doctor's orders (apparently they exacerbate the gastrointestinal issues I've been having for the past decade), so that certainly wouldn't be an essential.
I have an odd quirk in which I'll eat cereal out of the box whenever I'm hungry. Whether it be the afternoon or the dead of night, if I'm hungry, I'll eat some cereal. Thus, if we're out of cereal (preferably trash like Crunchy Nut or Nutri-Grain) I'll pester my mum to buy some next time she visits the grocery store. I just can't be without my boxes of cereal, because I don't enjoy eating anything nearly as much as cereal when I'm really hungry and it's not kosher to have a large meal.