They develop the habit of abiding in Christ and listening to the Spirit through prayer, worship and the Word of God. They first seek to find the Spirit working before they move. They ask the Spirit to do His work instead of depending on their own words, skills, or wisdom- everything they hope to see happen is the work of the Spirit. The witness admits their dependence and fruitlessness before God. They humbly ask God to use them and speak through them. If the Spirit says move (from here to there) they move- immediately and without reservation. Finally, they ask God to make Jesus known through them and in spite of their human limitations. Remember, all fruitful witness comes from God- live that, trust that, walk in that. Your only job is to obey the King by speaking.