Recent quotes:

Concrete goals are easier to achieve/measure = happinesss

Further experiments revealed that when people framed their happiness goals more concretely, they tended to get what they expected. In contrast, abstract goals tended to make people unrealistic. After all, can you really make someone happy in the long-term by telling them a funny story or giving them a gift? Of course not. But you can still make them smile. This research suggests that by thinking in concrete ways about our goals for happiness, we can minimise the gap between our expectations and what is actually possible.