I have a pantry full of food which I take out backpacking and it is food which is not eaten while I am at home as I do not want to get used to it or tired of it, so I save it for the trail. This includes my Tasty Bite collection, pouches of beans and rice (Seeds of Change), baked tofu pouches and assorted granola bars (probars, etc). When I start a trip therefore I am carrying stuff "new" to my palate and desired. For this reason I never eat oatmeal at home, so it becomes a treat on the trail.
I may even fast a few days before a trip just to get my tongue primed and my body relaxed and ready for a "feeding frenzy" once a trip begins.