"...you will be my witnesses in Jerusalem, and in all Judea and Samaria, and to the ends of the earth." (Acts 1:8).
A good team needs to have team members with different viewpoints as well as those who are specialists in a particular area. It is noteworthy that Jesus chose someone expertise in handling money. Taking a team of twelve around the country required money and the ability to manage it. I'm sure Jesus spent a great deal of time with Matthew mentoring him on the proper use of money. He had to reshape his thinking about money.
Once the team was formed Jesus spent time molding His team into a cohesive unit to operate in unity. He corrected them when correction was needed. He taught them what it meant to love one another. He washed their feet. He taught and modeled servant leadership. Before you put a team together sit down and make a list of the skills you want represented on your team. Then recruit and invest spiritually into your team. Who knows, your team might just change the world, too!