This isn’t one of the fastest ways to get rid of customers, but it’s definitely one of the best.
You’ll get away with it for a while because generally people want to believe the best of one another and because if you promise a customer, for instance, that you will definitely, positively have that new floor laid in five days, it will take them at least five days to discover that you made them a promise you couldn’t keep.
And then most people will tell themselves that things happen and you didn’t mean to lie to them and let you tell them the next lie.
But here’s the rub; they won’t fully trust you to fulfill your promise the second time – and they’ll be about one hundred times less likely to recommend your business to somebody else.