When something goes wrong, it can be satisfying to say, "Well, it's so-and-so's mistake." Or "I know I'm late, but isn't my mistake; the bus was late." It is probably not your mistake, but you form the habit of blaming (责备) somebody or something else for a bad situation.
However, you can have great power over what happens to you if you stop paying attention to whom to blame and start paying attention to how to improve the situation. This is the winner's key to success.
Winners are great at overcoming (克服) problems. For example, if you were late because the bus was late, maybe you need to leave home early. Or, you might call a taxi or call friends for help. For another example, if your workmate causes you problems on the job for short of ability, find ways of dealing with the problems rather than simply blame the person. You should accept that the person is not reliable (可靠的) and find creative ways to work successfully regardless of how your workmate fails to do his job well.
This is what being a winner is all about—creatively using your skills and talents so that you are successful no matter what happens. Winners don't have fewer problems in their lives; they have just as many difficult situations to face as anybody else. They are just better at seeing those problems as challenges and chances to develop their own talents.
So, stop paying attention to "whose mistake it is." Once you are confident about your power over bad situations, problems are just stepping stones for success.