But when, if you do this trick in a laboratory, yougive the electrons the chance to bypass a section of rock by way of a metal wire, quite large currents will flow.
If you think about it, this is another way of saying that for ourselves we should give thought to our choices by putting first things first, and not letting second things become first things.
Think of it thisway: If you are juicing up your attention and concentration so you can give 110% to a task you are taking 10% away from something else.
True, some 10% of gift-card balances never get redeemed (Mr. Waldfogel is on the board of a company that lets you direct this unused portion to charity), but gift cards are still an efficient way to give, he argues.