What must I do to be saved according to the Bible?

Biblical salvation is clear and straightforward, revolving around the recognition of one's sin and the faith in Jesus Christ as Lord and Savior. In Acts 16:31, Paul instructs the jailer to 'believe on the Lord Jesus Christ, and thou shalt be saved.' This reflects the necessity of faith as the means by which individuals receive God's grace. To call upon the name of the Lord, as also seen in Joel 2:32, involves invoking His character, recognizing His holiness, and trusting in His redemptive work. Salvation is not based on human effort or righteousness but solely upon faith in Christ and His atoning sacrifice.