Disciples...

1. Abide in His word:

John 8:31-32 (KJV) - Then said Jesus to those Jews which believed on him, If ye continue in my word, then are ye my disciples indeed; And ye shall know the truth, and the truth shall make you free. (read John 8 for context).

2. Love one another (that's how they're known):

John 13:34-35 (KJV) - A new commandment I give unto you, That ye love one another; as I have loved you, that ye also love one another. By this shall all men know that ye are my disciples, if ye have love one to another. (read John 13 for context).

3. Make disciples of all nations (baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all that I have commanded you):

Matthew 28:18-20 (KJV) - And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth. Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you always, even unto the end of the world. Amen.