Yes, it's simple enough to say "Just quit smoking". You've never been a smoker or been someone almost completely dependent on cigarettes.
I smoked regularly and quit except for social situations involving alcohol. It wasn't a big deal- I had smoked for years and decided I didn't want to keep doing it and stopped.
You know the hardest part about quitting smoking? The psychological bullshit about addiction to nicotine: you are taught that you are mentally and physically addicted to tobacco by the anti-tobacco lobby.
When you think "normally I'd have a smoke right now, but I'm quitting", all of the bullshit you've been indoctrinated into believing about nicotine addiction makes you think that you will have a lot of trouble resisting smoking that cigarette. In other words you think that not smoking the cigarette is going to be hard- and this powerful thought exists in your mind because you've been told it your whole fucking life. If anything, it's the last great advertising scam of the tobacco industry.
To reiterate: You've been told time and time again that you will want to smoke the cigarette when you quit. You've been told this by people who CLAIM they want to help you quit. However, this message perpetuates tobacco addiction. Who does this false message benefit? The tobacco industry.
I simply didn't believe the bullshit, all of the hype about tobacco addiction, and guess what? It's as easy to break the habit of smoking a cigarette as it is to break any habitual behavior- you just don't do it. It isn't going to be any harder to break the habit- except for all of the bullshit that has been driven into your subconscious and conscious mind from the "anti" (actually pro) tobacco industry.
The "anti" tobacco lobby is the tobacco industry's magnum opus, its last great hoorah. It's hard to keep customers when your product is dangerous and isn't actually very addictive- but pose as someone helping them quit who tells them it is very hard to quit... that's a Karl Rove.