Money is all about opportunity cost. Every time you spend on something, that's something you can't spend on something else.

One percent of people will always be honest and never steal," the locksmith said. "Another one percent will always be dishonest and always try to pick your lock and steal your television. And the rest will be honest as long as the conditions are right - but if they are tempted enough, they'll be dishonest too. Locks won't protect you from the thieves, who can get in your house if they really want to. They will only protect you from the mostly honest people who might be tempted to try your door if it had no lock".

While we somehow understand revenge on an intuitive level between individuals, I do suspect that companies, assuming that people are rational, completely miss and underestimate the motivation people have for revenge.

Money are very difficult to think about. So, we think about money as the opportunity cost of money. So, we at some point went to a Toyota dealership and we asked people, what will you not be able to do in the future if you bought this Toyota?

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.

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

When you get a checking account, you should have a savings account, and the number for the savings account should be one off of your checking account.