Enough.

"At this year's Berkshire meeting, someone asked Buffett why he doesn't have more stuff. Buffett's answer was that 'More stuff would not make me happier. It would actually decrease my happiness'... Most people don’t know what their Enough is. Or, they adjust their level of Enough with their income. A promotion leads to a fancier car or exotic vacations. Their Enough level is ever increasing. Figuring out and accepting a reasonable Enough level is a powerful and liberating concept."

Check out this entire article here: 1500days.com