Solomon writes in his proverb to "give me neither poverty not riches, but give me only my daily bread" (Proverbs 30:8). We only need enough. This goes for all things honestly. We only need enough food, possessions, and even time. It is how we use what we have that makes the difference.
Philippians 4:11-12 -- "Not that I was ever in need, for I have learned how to be content with whatever I have. I know how to live on almost nothing or with everything. I have learned the secret of living in every situation, whether it is with a full stomach or empty, with plenty or little."
It is when we want for excess that we get into troubles of the heart. Because then we tend to forget who the true provider is for all of our blessings. This is a difficult time of year for contentment, but that is exactly why we need to be reminded. By keeping Jesus and His love as the true focus of the season, we can find contentment even in a season of excess and wish lists.