What you'll need:
A small shell or other item you can carry with you
Yellow candle
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
and say:
"May my charm help me in all I do"
Keep the shell with you, touching it frequently to fill you with confidence.