Learn how to lose
“Winning is great, sure, but if you are really going to do something in life, the secret is learning how to lose. Nobody goes undefeated all the time. If you can pick up after a crushing defeat, and go on to win again, you are going to be a champion someday.” - Wilma Rudolph, Olympic champion
And here's the thing about data management. Your data (to some extent) always has errors. And chances are good, your system doesn't do everything you think it should. It's even possible it doesn't do what your vendor promised it would do!
There is always going to be some disappointment, some challenge, some "loss." What matters, as Rudolph so eloquently states, is how we respond to those challenges.
If you really want to be successful managing your data, acknowledge all that is or can go wrong, and work through it.