It means that you have to take that verse in the whole context of what Jesus was saying and in what the Bible teaches.
Jesus was warning against hypocritical judgment without mercy. He wasn't saying that a person couldn't confront another person who was behaving in a way that was contrary to God's will for their life.
Matthew 7:1 "Judge not, that you be not judged. 2 For with what judgment you judge, you will be judged; and with the measure you use, it will be measured back to you. 3 And why do you look at the speck in your brother's eye, but do not consider the plank in your own eye? 4 Or how can you say to your brother, 'Let me remove the speck from your eye'; and look, a plank is in your own eye? 5 Hypocrite! First remove the plank from your own eye, and then you will see clearly to remove the speck from your brother's eye.
John 8:3 Then the scribes and Pharisees brought to Him a woman caught in adultery. And when they had set her in the midst, 4 they said to Him, "Teacher, this woman was caught in adultery, in the very act. 5 Now Moses, in the law, commanded us that such should be stoned. But what do You say?"
6 This they said, testing Him, that they might have something of which to accuse Him. But Jesus stooped down and wrote on the ground with His finger, as though He did not hear. 7 So when they continued asking Him, He raised Himself up and said to them, "He who is without sin among you, let him throw a stone at her first."
8 And again He stooped down and wrote on the ground. 9 Then those who heard it, being convicted by their conscience, went out one by one, beginning with the oldest even to the last. And Jesus was left alone, and the woman standing in the midst.
10 When Jesus had raised Himself up and saw no one but the woman, He said to her, "Woman, where are those accusers of yours? Has no one condemned you?" 11 She said, "No one, Lord." And Jesus said to her, "Neither do I condemn you; go and sin no more."
Yes, to the best of my ability I follow what Jesus taught in my daily life.