Light a black candle and say:

 

"This holds me back.

No more will I do it.

No more is it a part of me."

 

Light a white candle and say:

 

"This is my might and my courage and my victory.

This battle is already won."

 

Picture in your mind the bad habit you wish to break. Picture yourself free from it. After a few minutes of imagining victory extinguish the black candle, then the white candle.

 

Repeat a week later if necessary. Best done during a waning moon.