During Paul's second missionary journey, he visited Phrygia, Galatia, Troas, and Macedonia.
The Holy Ghost directed Paul throughout his journey. The Spirit prompted him to no longer remain in Asia. He was then going to go to Mysia and Bithynia, but the Spirit again prompted him not to. When Paul got to Troas, he then received a vision of where he was supposed to go next. A man of Macedonia was in his vision, and said to him, "Come over into Macedonia, and help us". Paul also went to Corinth, where the Holy Ghost prompted him to continue preaching the gospel.
The Spirit has directed my missionary efforts by leading me to people that I became friends with, and then I was able to introduce them to the gospel. My friends have often times turned to me when they were experiencing trials, and I have been able to help them through the principles of the gospel. Now that I am up at a church school, I don't have as many nonmember friends. But I know that after I graduate there will be plenty of people I will come into contact with that I could befriend and then introduce to the gospel. I could be more directed by the Spirit by asking the Lord who I could serve and help in order to bring about His Kingdom.
Paul was able to preach the gospel so effectively because he was in tune with the Spirit. He had no other agenda except to follow the Lord's will and preach His gospel. Being led by the Spirit, he was able to do exactly this.
Paul let his experiences turn into missionary experiences. When he was imprisoned, he still prayed and sang hymns of praise to God and all of the other prisoners could hear. Because of his example, the prison keeper sought after him, asking what he should do to become saved, and was later baptized. From Paul's missionary experiences, I learned that even when things are not going your way, you can still be an example to others and lead them to the gospel.
The jailer is an example of a true convert because he was touched by the Holy Ghost after listening to Paul sing and pray, and desired to know how to be saved. He was baptized in that same hour.
Even though we do not understand everything about God and the gospel, the principles needed to gain salvation are simple and true. We need to repent and become baptized and have faith in the things that are true of the gospel.
I can follow the example of Paul to become a better missionary. I can seek the Holy Ghost and increase my faith, and I know that I will be able to be a better instrument in the Lord's hands.