I would also like to add. Prayer and Fasting is very cool. I had a few friends fast and pray for someone I knew. They did this for like 2 or 3 weeks. Out of the blue that person called me up and was crying to me asking for forgiveness and wanting to make a change in thier life. I was so surprised!!!
I remember a friend was fasting and praying for me. I didnt know it. One night I had this dream of a church and that person was asking me to come to the pool of water. They asked me if I would get baptised in the dream.