My father didn't so much give advice as tell parables. He told a story about being caught in the wrong and how, by coming clean, he avoided much bigger problems if he'd lied and been found out.
I applied that advice many times in business. If we let a customer down, I didn't try and blame the trucking company or say the machine had broken down, I said we'd made a mistake. I've kept big contracts because the buyer said they knew we would always be straight.