You really need to be aggressive about giving up.
New year's eve came quicker than anticipated for me so I went out at 10pm and bought myself a pack of B&H Gold --- Luuuurrrrvvvely drag tbh as I had been stressing all day over the whole giving up prospect

(If you're not ready you're going to find it exceptionally difficult - Withdrawal symptoms seem to be amplified by a factor of 10)
Last Sunday evening I felt exceptionally angry and very fed up of still being a smoker (17years?). Had my last cigarette and am a lot happier today. Still early days yet, I have yet to go through the 'coughing up your guts and intestines period (in a couple of weeks)
This is my third attempt at quiting
First time (6 yrs ago) - Gave up for 3 months ? (Probably the best time of my life, literally forced myself back on to the weed)
Second time (2.5 yrs ago) - Didn't really last that long - 1 month ? I wasn't really committed to giving up
Now - Almost a week. This time I'm not taking as much Nicotine replacement therapies as before and am doing better than I had expected.
Overall the first three days are the worst after that you'll fast see the benefits.
Even after 4-5 days you start noticing - Food tastes like it's made in Heaven, sex is great, sense of smell returns, more energy, you don't feel tired(this can also be a con)
Into the following week you'll soon discover how bad you smelt as a person / all the nasty bad smells out in the street/public transport.
Week 3+ Start coughing all the **** out of your lungs - Dreading this bit but it'll be worth it trust me.
1 month - you're almost home
3 month - you rarely ever think about a cigarette.
JUST GET READY FOR THE BEST DECISION YOU'LL MAKE IN YOUR LIFE - GIVING UP