Rather than saying you’ll save time and leave it to them to imagine what saving time means to them, say, “So instead of spending an hour changing the oil in your car, you’ll spend 10 minutes. You can use the rest of that time to take your kids out to a movie. Or you can spend the time with your family or spend the time practicing your golf swing,” or something like that.

Bring it home to them.

Sam Fishbine, Gary Halbert: XXX, p.14