I detailed both my cars this weekend. I actually get a tiny little flathead screwdriver and a wet papertowel and clean out all the gunk in the cracks and coffee holders. I spray down the windows inside and the dash. I Armorall the plastic.
The only thing missing is a can of "New Car Smell."
I drove to work today and it felt like a new car with 75K miles on it (a 1999 Ford Taurus). Clear dashboards, crispy clean carpets (used some OxyClean).
I also use Nu Finish - car polish for 1X/year (I do it twice - once in fall for winter weather and once in spring for summer weather). But that's next month - I'll apply a coat for that.
Ahhhh, good for at least another 40K miles.
Cures the new car bug instantly.