There is something called the stop smoking shot, but some of the best techniques are the oldest.
Drink more water, detoxify, try to find something to replace your smoking habit with. Suck on cinnamon sticks instead of smoking cigarettes, get creative with this. Chew sugar-free gum or nicotine gum. Keep your mouth busy, smoking seems to be based in part on some kind of oral fixation. Eat healthy food, and avoid alcohol if alcohol causes nicotine cravings. The same goes for coffee, temporarily anyway.
Try avoiding plant foods from the nightshade family. These are all close relatives of tobacco and may interfere with detox. Tomatoes, eggplants, potatoes, and bell peppers are all nightshades which contain traces of nicotine in them naturally. Avoiding them may help control cravings since even a tiny amount of nicotine may set off cravings for more nicotine.
If you are under a lot of stress, try to find healthier ways of controlling or eliminating the stress from your life. Smoking and stress are often very interrelated. Try yoga or meditation, or breathing exercises.
Try the herb plantago(plantain) - it seems to help cause smoking aversion in many people. Do not confuse them with the banana like plantains, they have no relation to them. Plantago can grow almost anywhere, even in parks or on the street near you but be careful if you want to harvest, since there is the risk of germs or chemical contamination due to lead or other toxins. Of course it is possible to buy it too. Many smokers claim plantains caused them to hate smoking and helped them quit for good.
Write down all the reasons you want to quit smoking, and then write all the reasons you want to continue smoking. Compare the lists. Keep a journal and pay attention to what causes you to smoke more and what helps you smoke less. Stay focused on your goal.
Try aversion therapy. Look at images of the diseased, blackened lungs of smokers, look at photos of people dying from lung cancer in hospitals. Take note of how smokers live shorter lives than non-smokers, are less attractive to others, and have higher rates of cancer, heart disease and respiratory diseases.
I hope you quit and I hope this helps!