The why and the how of reaching out and affecting people around you so that they can meet God.
You may find the following helpful in communicating the Gospel to others:
http://www.cru.org/how-to-know-god/would-you-like-to-know-god-personally.html

Jesus' instructions to the 70 disciples that He sent out are the same to us today.

Helpful and practical tips for witnessing on the streets.

The essentials for starting a group.

How to start ministering to children in your small group or Church.