I believe nicotine patches and e-cigs have the highest success rates.
It's worth giving both a try.
I tried the patches a few years ago. They were recognised as having the highest success rate at the time (e-cigs either weren't around then, or weren't well known). Personally I didn't take to them at all. Waste of money for me. But I don't regret trying them. Better to waste money on something that might work (but in the end didn't) than to waste money on putting something cancerous in my mouth, setting it on fire, and inhaling deeply. (Wow, when I put it like that...)
After much nagging from the wife and kids I finally tried e-cigs early last year, and I took to them instantly. Cost £37 to get a full starter kit, and costs about £10 a week thereafter. I haven't tried cutting down the nicotine yet. Might do eventually, but I like smoking my e-cig. (Especially since switching from tobacco flavour to some of the alternative flavours - but I'm glad I started on tobacco flavour.)
There's no guaranteed way to quit. It's different for everyone. And as Kieron says, if you don't really want to quit then no measures will have much effect. But if you're sure you want to quit try one of the above.
