With smoking, there is a mental addiction and a physical addiction.
The mental addiction usually comes from how you perceive cigarettes and the reason behind why you smoke.
If you believe cigarettes make you happy and relieve stress* then any time you feel upset or slightly stressed you will in turn think about cigarettes and want one.
(Nicotine is actually a stimulant and can cause you to become more stressed.)
Saying things such as "I need a cigarette" is also bad because you don't "need" a cigarette but you want one. Saying things like this only makes giving up harder in itself as you make yourself believe you can't go without one.
Having a clear definitive reason for legitimately giving up is also useful;
Such as cancer, organ failure etc,
The amount of money cigarettes cost you which you could be saving,
The annoyance of cravings when you need one but can't have one
or other health issues such as; pregnancy, wrinkles, ageing, yellow stained teeth etc.
If you just say with the attitude of "Because I don't want to" more than likely you will keep smoking.
Removing anything that reminds you of cigarettes (paraphernalia) around you such as, Ashtrays, cigarette packets, and lighters... can help to not remind you of cigarettes and smoking. Which should reduce your cravings. It's like the opposite of looking at someone smoking and wanting to smoke.
Also, some people are habitual about the times they smoke. They will want a cigarette around a certain time of the day because they've made this a routine. This can either be mental or sometimes physical. (which I'll get to in a second)
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Then you have the physical addiction.
Dopamine is a chemical in our brain which when released can give us the feeling of pleasure.
Nicotine in cigarettes, triggers the release of dopamine.
Our brain is used to a certain amount of this chemical and as we smoke and release this chemical, our "normal levels" of this chemical go up.
As these levels go up, you will want more cigarettes to equal out these levels.
It is only when these levels drop below "normal" that our brain feels we need it and in effect, cause you to have cravings.
When these levels drop a lot and our "normal levels" go down, you will experience withdrawal symptoms.
(Some people may notice that they can go awhile without smoking, but when they do smoke again, they will smoke a lot more than they usually would. This is the reason why. Your brain is trying to raise these levels to what they are used to.)
And this is also the main reason as to why people need to cut down on how much they smoke. So they slowly reduce these "normal levels" of dopamine and stop withdrawal symptoms.
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As for giving up there is plenty you can do.
-Cut down on how much nicotine you have a day e.g. going from 6 to 5 to 4 etc.
-Removing anything that may remind you of smoking.
-Know why you smoke and give yourself legitimate reasons to stop.
and remember that with smoking, you have a choice.
-Keep busy when you get a craving and persevere.
(Or substitute for something such as tea, although tea contains caffeine.)
-Get cigarettes out of your routine.
-Buy less, e.g. buy 10 instead of 20 to make them last you and do not buy more in that day/s
-Do not smoke for the sake of smoking or time wasting, pre-occupy yourself with your phone or something else around you.
-Stay away from smoking areas, or going outside when someone else is (to smoke)
-Say no and feel happy doing so, when or if you are offered a cigarette.
The idea is to cut down, forget, and avoid cigarettes until you are accustomed to going without and your levels are normal.
People who smoke the e-cigarettes are at no more risk to becoming more addicted or giving up than anyone smoking normal cigarettes. Except, it doesn't contain all the chemicals and risk of death that normal cigarettes contain. Will power and wanting to are key.