If faith without deeds, or actions, is dead, then what are these concrete actions? I have been very concerned lately with James 2, starting with verse 14, especially with actions related to faith:


  What good is it, dear brothers and sisters, if you say you have faith but don't show it by your actions? Can that kind of faith save anyone?
  Suppose you see a brother or sister who has no food or clothing, and you say, "Good-bye and have a good day; stay warm and eat well"—but then you don't give that person any food or clothing. What good does that do?
  
  So you see, faith by itself isn't enough. Unless it produces good deeds, it is dead and useless.
  
  Now someone may argue, "Some people have faith; others have good deeds." But I say, "How can you show me your faith if you don't have good deeds? I will show you my faith by my good deeds."
  
  You say you have faith, for you believe that there is one God. Good for you! Even the demons believe this, and they tremble in terror.
  How foolish! Can't you see that faith without good deeds is useless?
  
  Don't you remember that our ancestor Abraham was shown to be right with God by his actions when he offered his son Isaac on the altar? You see, his faith and his actions worked together. His actions made his faith complete. (James 2:14-22, NLT-SE translation)


I would like an overview of how published Bible commentaries have addressed the following questions in reference to this passage:


What specific action or actions show one's faith?
Are these actions required for salvation, or simply evidence of living a Christian life? 


The motivation for this question is that I want to become a Christian and not just believe in Christ. I would like my actions to speak by themselves as a testimony of Christ in me. My end goal is to build a list out of your answer, so if possible please quote verses.
In the Protestant belief, works are a sign of faith, and the Holy Spirit working in the life of the believer.  

The ESV commentary elaborates on this interpretation thusly:


  Faith without Works Is Dead. James continues the theme that hearing/faith must lead to doing/works. It may seem that James contradicts Paul’s “by grace you have been saved through faith . . . not a result of works” (Eph. 2:8–9). In reality there is no contradiction between faith and works. Paul and James agree that the basis of salvation is grace alone through faith. Works are not the basis of salvation but the necessary result (Eph. 2:10).


Similarly, from the HCSB Study Notes:


  2:15-17 Giving a blessing to someone in need without offering tangible aid is useless. If faith is not accompanied by works, it is dead by itself. 2:18 The argument turns to the relationship between faith and works. Beginning in this verse James answered a “straw man” argument (but someone will say) against his assertion that faith without works is dead. 2:19-20 The demons also believe—and they shudder is an answer to the mistaken assertion that belief in God by itself is sufficient for salvation. Demons believe, but it is impossible for them to be saved. Saving faith entails more than mere knowledge. It includes trust and obedience, for faith without works is useless.


As to what specifically the good works are, James cites 2 historical examples of works as a result of faith in Abraham, and Rahab.

From the ESV published commentary:


  James 2:21 Abraham . . . justified by works. James may seem to contradict Paul here (compare Rom. 4:2–3). However, while Paul cites Gen. 15:6 to show that Abraham was justified by faith, James bases his claim on Gen. 22:9–10, where Abraham was willing to offer Isaac as a sacrifice. Thus James apparently has a different sense of the word “justify” in mind here. Paul uses “justify” to express being declared righteous by God through faith, on the basis of Jesus’ atoning sacrifice (Rom. 3:24–26). James seems to use “justify” to stress the way in which works demonstrate that someone has been justified (compare Matt. 12:33–37). Paul emphasizes how one is justified; James focuses on what justification looks like in practice.


But to your question, about application, I would start broadly with the Great Commandment.  Jesus tells his disciples:


  37 And he said to him, "You shall love the Lord your God with all your heart and with all your soul and with all your mind.
  38 This is the great and first commandment.
  39 And a second is like it: You shall love your neighbor as yourself.
  40 On these two commandments depend all the Law and the Prophets." - Matthew 22:37-40 ESV


And similarly:


  34 A new commandment I give to you, that you love one another: just as I have loved you, you also are to love one another.
  35 By this all people will know that you are my disciples, if you have love for one another." - John 13:34-35 ESV


So, worship is loving the Lord with all your heart and your actions, and good works is the love and actions you show one another.  To drill down deeper to see what some examples of these works of love might look like, there are a couple of verses in which Jesus elaborates:


  34 Then the King will say to those on his right, 'Come, you who are blessed by my Father, inherit the kingdom prepared for you from the foundation of the world.
  35 For I was hungry and you gave me food, I was thirsty and you gave me drink, I was a stranger and you welcomed me,
  36 I was naked and you clothed me, I was sick and you visited me, I was in prison and you came to me.'
  37 Then the righteous will answer him, saying, 'Lord, when did we see you hungry and feed you, or thirsty and give you drink?
  38 And when did we see you a stranger and welcome you, or naked and clothe you?
  39 And when did we see you sick or in prison and visit you?'
  40 And the King will answer them, 'Truly, I say to you, as you did it to one of the least of these my brothers, you did it to me.' - Matthew 25:34-40 ESV


Another example given by Jesus is in Luke:


  29 But he, desiring to justify himself, said to Jesus, "And who is my neighbor?"
  30 Jesus replied, "A man was going down from Jerusalem to Jericho, and he fell among robbers, who stripped him and beat him and departed, leaving him half dead.
  31 Now by chance a priest was going down that road, and when he saw him he passed by on the other side.
  32 So likewise a Levite, when he came to the place and saw him, passed by on the other side.
  33 But a Samaritan, as he journeyed, came to where he was, and when he saw him, he had compassion.
  34 He went to him and bound up his wounds, pouring on oil and wine. Then he set him on his own animal and brought him to an inn and took care of him.
  35 And the next day he took out two denarii and gave them to the innkeeper, saying, 'Take care of him, and whatever more you spend, I will repay you when I come back.'
  36 Which of these three, do you think, proved to be a neighbor to the man who fell among the robbers?"
  37 He said, "The one who showed him mercy." And Jesus said to him, "You go, and do likewise." - Luke 10:29-37 ESV


These are a few of the biblical examples of the good works of those of faith, but they are by no means intended to be complete or exclusionary.  We are commanded to love our neighbors and seek ways to be servants to others as Christ served and lived on Earth.