I reward myself by living life more fully. Whether it is being conscious in bed at night and talking with my wife or being there for a friend who needs to talk or watching my body become healthier and more fit..... the rewards are all around me.
I don't celebrate my quit date because I had too many of them and each had a special meaning.... sometimes I would actually trick myself into waiting for an auspicious date before quitting because it would be better ..... (procrastination..) It's been about six months and some day, God willing, it will be many years but I feel rewarded every second of every day.
Jonathan