For many people, giving up smoking successfully has more to do with mindset than with willpower. They get sick, a friend gets a bad diagnosis, or they suddenly have an epiphany that what they're doing is damaging they're health.
For Christina Hartnett Dalton, from Ballyhooley in Cork but now living in Kinvara in Galway, it was something her eight-year-old daughter said. Last year, Christina's daughter Rhiannon said, "what will we do if you die? Please try."
Christina gave up cigarettes for six months but a thoughtless comment made her take up smoking again. On holidays with her husband, Paul, and their daughter and five-year-old son Seamie, they were out for dinner.
They asked for a table for four but the waiter said they only had a table for five. A waitress said a table for five was fine as the family was technically five as she thought Christina was clearly pregnant.
But Christina was not pregnant, she was just carrying the extra weight she had put on after giving up smoking. She immediately left the restaurant and bought a pack of cigarettes.
The comment had been doubly hurtful to Christina because she and Paul had had fertility problems and gone through IVF without conceiving. They adopted their children from Vietnam.
"People make comments and don't realise. I just said 'I have to have a cigarette' and I smoked for the two weeks of the holiday. I said, when I go back I'll give up."
But when they got back home, she couldn't give up.
By now, Christina had smoked for 25 years and this year, she finally made the decision to quit, in conjunction with 'Operation Transformation' and Boots' Stop for Good Service.
Like many teenagers, Christina started smoking because everyone else was doing it. "My friends and my older brothers and sisters were smoking. Everyone smoked. My mother never smoked and always said, if 'I ever catch you I'll kill you', but that wasn't really a deterrent. I thought it was cool, I thought I'd try it.
"They were rotten, horrible things and I think I probably wasn't really smoking for about a year but I persevered. And you could buy 10 cigarettes back then too, you could smoke in a restaurant, you could smoke in your office. I remember in my first job there was a lady there who had a huge glass ashtray on her desk and she smoked non-stop. And nobody minded."
When she was 22, Christina developed asthma. "I gave up cigarettes but the temptations were everywhere. So I started smoking a weaker brand. I was thinking if I smoked a weaker brand it wasn't as bad. Every time I'd go back on the cigarettes, I'd go back on a lighter brand.
"When you're 22 or 23, there aren't really any side-effects you can see. You're young and you're fit and healthy, it's not as important. When I was that age I felt it would be fine if I just went on a weaker brand."
There have been many indicators of smoking in her life. "You hate smoking, you know they're bad for you, it's bad. Of course, my teeth aren't as white as they used to be, my voice has changed, it's that smoker's voice." She also has mild asthma, which has led to increasing shortness of breath.
The programme promises that within one day, a former smoker's risk of heart attack begins to fall, within two days they will have a better sense of taste and smell and will feel more energetic, within three to nine months their lung function increases and after a year, their risk of dying suddenly from heart attack is almost halved.
Faced with those statistics, Christina made an appointment online at boots.ie/stopforgood. In advance of going to her appointment, she completed a smoking diary and had to think about the reasons she smoked and how she was going to stop for good.
'I met with Deirdre in Boots in Galway and went through the programme. It makes you sit down and think you'll have to do something different. You can't do will power only. It didn't work for me the last time.