Basically, by intentionally depriving myself of something, it stops being "normal" and becomes a luxury. I was at my parents' house for Christmas in December, and felt like I was at a 5 star hotel.
I've done similar "hacks" to my diet. I did a month where I ate nothing but rice and beans (a very very healthy dish, actually). The first week or so when I was finished with the experiment, everything I ate tasted amazing.
The car that I drive is fairly beat up; I drove my sister's car to San Diego a few months ago, and I might as well have been driving a Bentley. A CD player? I can listen to whatever music I want!? It doesn't rattle when I go over 55?!? I can hold a conversation inside without having to yell?? etc. etc.