One of the big lessons from behavioral economics is that we make decisions as a function of the environment that we're in.

Why would you take money out of your paycheck at the beginning of the month when you don't know how much money you'll need?

That’s a lesson we can all learn: the more we have, the more we want. And the only cure is to break the cycle of relativity.

The idea that you will make the right decision every time is very unlikely.

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.

People are willing to work free, and they are willing to work for a reasonable wage; but offer them just a small payment and they will walk away.

What you should do is wait until the end of each month, and then say, "OK, how much money do I have? How much do I need? Let me send the rest to retirement."