The experiments show quite clearly that, as you resist more and more temptation, you're actually more and more likely to fail.

What reminds you in your environment about saving? Nothing.

It is very difficult to make really big, important, life-changing decisions because we are all susceptible to a formidable array of decision biases. There are more of them than we realize, and they come to visit us more often than we like to admit.

The more cashless our society becomes, the more our moral compass slips.

When we save, everybody in the household is just suffering. By having the coin in a visible way, when you scratch, you can say the person that is in charge of the making money for the family is doing the right thing.

Once you break the social norm and create a new social norm, all of a sudden it can stay with us for a long time.

We can think about how we reduce the pain in paying. So, for example, credit cards are wonderful mechanisms to reduce the pain of paying. If you go to a restaurant and you are paying cash, you would feel much worse than if you were paying with credit card. Why? You know the price, there's no surprise, but if you're paying cash, you feel a bit more guilt.