I have been smoking since I was 18, and it is all BS...I've never gone above 6 cigarettes a day...can quit whenever I want
That only means you are not properly addicted and thats good for you.
But there are people have a real problem and all what i mentioned are merely clinical symptoms, present in the last majority of chronic smokers who are trying to quit. It is a fact that cannot be denied and it has been discussed in medical congresses i assisted, backed up with statistical studies.
People who are trying to quit this drug, really are suffering!
For me, it was a days decision to quit and i never touched a cigarette again,
(except an occasional victory cigar on extremely rare cases

)
But i wasnt addicted either...
For quitting smoking you must consider the benefits it gives you and you people who live beside you.
-Smoking is officially admitted as a major cancer risk factor
-and it provokes or aggravates cardiovascular problems, both by direct and indirect mechanisms.
-It also affects you and the people you love, you condemn them too
-Its a major financial issue too, taxes are constantly rising, new laws forbidding/banning it from public places may lead to additionally costs by the new fines set for this. The average 60 year old smoke could afford the money to buy a MERCEDES SLK, if he were saving all this money
-It is not considered a cool habit anymore, it only demonstrates the lack of respect to people, to nature and above all, to your self!
-It is not considered the forbidden pleasure, only few adult men, are brave enough to enjoy. Most of the nerds who want to look "tough" and "different/special" do smoke, only very few mature and really special people resist...
As for what to do with your empty hands, here are a few ideas,
you may curry a rosary, a mobile phone, your car keys, or keep your hands in your pocket
