I have been listening to some great audio from a Church Planting Conference that was hosted at our home church with Bro. Earl Jessup. You can listen to all the teaching free on Sermon Audio at this link here.
There is great material from Bro. Jessup and other international church planters. If you are a church planter or a missionary, I challenge you to go and listen to all of the messages.
Find more helpful material at bcwe.org.