To be a servant, a person needs to give up his own will and way; the laying aside of our rights in order to serve others. This enables a person to live like Christ. Consider the following scripture concerning Jesus' service:
Let this mind be in you, which was also in Christ Jesus: Who, being in the form of God, thought it not robbery to be equal with God: But made himself of no reputation, and took upon him the form of a servant, and was made in the likeness of men: And being found in fashion as a man, he humbled himself, and became obedient unto death, even the death of the cross. Wherefore God also hath highly exalted him, and given him a name which is above every name: That at the name of Jesus every knee should bow, of things in heaven, and things in earth, and things under the earth; And that every tongue should confess that Jesus Christ is Lord, to the glory of God the Father. Philippians 2:5-11
It is only through full repentance that we can start with the life of a Christian servant. In Luke 3:17, John describes about those who refuse to live for God (the chaff) and those who live for God (the wheat). Those that live for God have repented and reformed their life. They are beginning a new life of productive service for him; they will not be refused and discarded by God - because they are his true servants.
Furthermore we need to be sure that we keep our motivation right. Doing something for show rather than from a pure heart and love for others, is not the will of God. A person needs to bring their inner life under God's control then their outer life will reflect God's love. How many times have you seen a person do something and you thought "that person is doing this for show." You can see-through people who are self-motivated and people who really care for others.
In addition, we need to remember to spend time everyday with Jesus. We must avoid being like Martha (see Luke 10:38-42) and being so busy that we can forget to study and ask God for direction. As a servant we need to look to Jesus everyday as our guide, example, and strength.
Being a servant stops us from focusing on ourselves and keeps us aware of the needs of others. The world sees power as a way to gain control over others. But Jesus, who has all power and authority in heaven and earth, showed us how to serve others. His life offered many examples: he healed the sick, washed the disciples feet, held children, and died on the cross for the sins of the world. As believers, we are called to be servant's of Christ, and to walk in his steps "Who, being in the form of God, thought it not robbery to be equal with God: But made himself of no reputation, and took upon him the form of a servant..."