The Yog Pranayam (breathing exercises) will help with smoking problem and other habits.Start today and do it with concentration.Come back to report your progress, so that others may benefit.You will definitely be able to quit smoking with this.It is up to you to keep doing the pranayam daily.
Build up your timing gradually. If you feel tired or dizzy, stop and resume after 1 minute.
Bhastrika - Take a long deep breath into the lungs(chest not tummy) via the nose and then completely breathe out through the nose. Duration upto 5 minutes.
Anulom Vilom –
Close your right nostril with thumb and deep breath-in through left nostril
then – close left nostril with two fingers and breath-out through right nostril
then -keeping the left nostril closed deep breath-in through right nostril
then - close your right nostril with thumb and breath-out through left nostril.
This is one cycle of anulom vilom.
Repeat this cycle for 10 to 20 minutes twice a day.
You can do this before breakfast/lunch/dinner or before bedtime or in bed.Remember to take deep long breaths into the lungs.You can do this while sitting on floor or chair or lying in bed.
Bhramri Pranayam -Close eyes. Close ears with thumb, index finger on forehead, and rest three fingers on base of nose touching eyes. Breathe in through nose. And now breathe out slowly through nose while humming like a bee.
Duration : 5 to 12 times
When I quit smoking, I chewed an endless supply of chewing gum. Or you could try lollipops, the smallish kind. Any kinda candy you can put in your mouth and fool with. Also, since I chewed gum, I needed to do something with my hands. So, I had some worry beads, which for me consisted of some long plastic beads that were a necklace, I wore them and worked on them all the time. I also lit incense every afternoon for a while, would walk up to it and breathe it, seemed to dispell that stark reality I was facing. After three days of quitting, the nicotine is gone, the worst is over. The rest is psychological.
So, anytime I wanted a cigarette, I found something ELSE I liked to do until the feeling passed...the feeling is fleeting. At first, I felt the urge every half hour or so... eventually that spaced out to a few times a day, and after a month, just every couple months, and finally not at all. If you pick a quit date, and you wind up not making it to the end of the day, set another quit date within a couple weeks. But that shouldn't happen. Also, leading up to quitting, start cutting back on how much you smoke, it'll make the transition easier. Oh, and despite advice usually given, keep a pack in the house, that way the feelings of wanting one won't be as difficult, becuz you know you can just go in the next room and light up. That worked for me, and eventually I threw them away.
Based on what you wrote, and my own experience, I'd suggest thumb sucking as a perfect alternative, given that it's free, legal, convenient, effective and more.