Aparigraha, or non-hording.
This is a challenging time of year to practice, with all the sales and pretty papers and bows. It may also be the most rewarding.
Note: I didn't say perfect... let's just recognize the fine line between "want" and "need".
Here's a video that hits the nail on the head. Its an oldy but a goody about our aquisitive habits and their results:
Caution: There's a bit of foul language but plenty of good chuckles: George Carlin "Stuff"