When you know you have a decision to make, or a step to take, confirmation can be good. It can be reaaaallly good if it's a life-changing step.
God will confirm his direction for you through the Bible. For instance, there is no need to think you should leave your spouse for someone else. God has already confirmed that. There is no need to compromise your character for any reason. God has already confirmed that through the Bible.
God will confirm his direction for you through your circumstances. Maybe you want a new job, but aren't sure if that's the step for you. You walk in on Monday and you get fired. Consider it confirmed!
God will confirm his direction for you through other people. It's amazing how God will bring people into your life to confirm your giftedness and direction. But you do have to be prepared to hear the opposite - that the step you want to take doesn't make sense. While this won't necessarily stop you, it should cause you to drill deeper.
God will confirm through His Spirit. You'll just know it's something you should do. After understanding what the Bible says, talking to spiritual friends, your direction can begin to take shape. God will confirm the step in your spirit by making it a "must do." You won't be able to live not taking the step!