What you'll need:
Light the candle and hold it in your right hand. Say:
"Please give me confidence
So I can be the best
I failed it once
But now I will be better than the rest"
Pass the shell through the flame and say:
"May this be my lucky charm so my wish can come true"
Kiss the shell for good luck and pass it through the flame one last time
"May my charm help me in all I do"
Keep the shell with you,
touching it frequently to fill you with confidence.