The book of Acts is full of instruction! It instructs us in the establishment and the expansion of the early church. It instructs us in the divine pattern of 
conversion to Jesus Christ. It instructs us in the tried and proven method of reaching the lost.
Reaching the lost in the first century was personal. Peter and John looked the members of the Sanhedrin in the eye in Acts 4. The same could be said of Stephen (Acts 7), Philip (Acts 8), Ananias (Acts 9), Peter (Acts 10), Paul (Acts 16), Aquila and Priscilla (Acts 18), etc. The divine model of the most effective method of reaching the lost is the personal, eye-to-eye encounter.
Reaching the lost in the first century was to the point. Peter preached the deity of Jesus Christ and the essentiality of immediate obedience (Acts 2:22-39; 3:13-26; etc.). The same could be said of Stephen, Philip, Ananias, Paul, etc. The divine model of the most effective way to save the lost is to immediately get to the point–Jesus is God’s Son and you must obey Him right now! Brother and sister, are you practicing God’s tried and proven method?