Any. It takes you body4 days to withdraw from nicotine. The rest is the psychological part. You need to understand why you like to smoke and work on that part or stoping won't be permanent. There are many pharmacological agents, e cigarette and you can google for support and hot lines.
Combinations. The overall best results in smoking cessation come from the use of a medication combined with a formal smoking cessation program. All of this requires, first and foremost, the motivation to quit. I start my patients with nicotine replacement therapy - patches plus lozenges usually - together with a formal program. Wellbutrin (bupropion) is another med, and ultimately the best results have been with chantix.