Let me rephrase...CHRISTIANS only...how has God used you to glorify Him?

i really want God to use me, i want to help Him do his work somehow...i know He will but i am just waiting for what He's going to ask me to do. what about you? how has He used you in Church or elsewhere to bring glory to him? i pray that He will make me useful all the time, how will i know when He's called me to do something??