Spiritual preparation 
Before you go:
Pray regularly
Prepare your testimony and practice it
Think about your response to some of the questions you might get asked
Prepare some activities to do in worship eg drama/mime/songs/sermon
But think also about how you might encourage the missionaries eg some devotional time spent with them and their children
Decide how you are going to organise your group sharing time while you are overseas (while you’ll need to be flexible with this, it is good to have a plan)
Spend some time thinking about what might be spiritually different
Determine as a group what the aims of your mission trip are – and how you are going to work together to achieve them
While you are away:
Try and maintain (or develop) your personal spiritual life – set aside time to pray and read you bible
Use a journal – it is a great tool to assist your continued learning (and sharing) when you get back
Personally and as a group reflect theologically together
Work towards the achievement of your mission aims
Spend time praying and sharing together
Deal with conflict as it arises
Always try and be an encouragement to your Christian brothers and sisters
Don’t forget that ensuring you get enough sleep will help you maintain your “emotional and spiritual balance”
When you come back:
Pray regularly
Tell the story of your trip to your church and to other groups who may be interested
Say thank you to the people who supported you
Write to thank the missionaries and the national people who helped make your trip happen
If you said you would send photographs to people overseas then do send them
Spend some time debriefing with other team members
Take the time to decide if you want to make the changes in your life you thought you would when you were overseas