I Slipped and Smoked...

A reader asks:

"I quit smoking 3 months ago. I've been feeling depressed, and smoking was tempting me more and more. I slipped and smoked, but I only had one cigarette. In fact, I didn't smoke the whole thing - just a few puffs. Do I have to start over from day one again now, or should I just go on as though it didn't happen?"

• Rationalizations for Smoking

• 5 Steps That Lead to a Smoking Relapse

• There is No Such Thing as Just One Cigarette