It is likely that someone you know has died from smoking or a related illness

Since it is  likely that someone you know has died from smoking or a related illness, use the thought of tat person or their dying and death as a mental reminder that you are committed to quit smoking.  Use the death as a reminder that you are choosing not to have the same destiny.  You can make their death have purpose and that can be to help you quit this nasty harmful addiction, during moments of urges and desire to inhale once again.
In our case it was aunt Joyce.  Aunt Joyce was my friend's father's sister. She was quite a character.  She was loved. 
Remember aunt Joyce and the suffering she endured at an age long before her natural time was up.  Remember others who have not quit and succumbed to the same! NOT YOU!