Motivation, basically getting people to be happy at work, everybody - everybody benefits.

Rainy day savings are incredibly important, because from time to time, bad things happen. And if you're not prepared for that, it's going to be really terrible.

If you want to spend more money in restaurants, use credit cards more than cash. If you want to spend less, use cash more than credit cards. But in general, we can think about how to use the pain of paying and how much of it do we want. And I think we have like a range. Credit cards have very little pain of paying, debit cards have a little bit more because you feel like today, at least it is coming out of your checking account, and cash has much more.

Once we start thinking of ourselves as polluted, there is not much incentive to behave well, and the trip down the slippery slope is likely.

The most difficult thing is to recognize that sometimes we too are blinded by our own incentives. Because we don’t see how our conflicts of interest work on us.

I don't think we should go around life and being miserable all the time and feel the pain of paying. It's a question of what categories we want to spend more on and what categories we want feel that we are spending too much on and we want to cut down.

The people that lend you money basically give you an answer based on the risk that they are willing to take. But just because a bank is willing to take a particular risk doesn't mean that that is the right amount for me to spend.