What do you think is the most correct way to quit smoking?

I have been smoking for six years, but I suddenly gave up smoking six months ago. The whole process was extremely relaxed (I didn't feel sick and wanted to smoke). The biggest reasons are the change of life attitude (sincerely advocating a healthy lifestyle) and exercise (running and sweating). Quitting smoking is just one of many unhealthy living habits. Friends who want to quit smoking must be concerned about the unhealthy effects of smoking, not the cigarettes themselves, right? In order to be healthy, there are many things worth changing besides quitting smoking. Exercise can obviously increase people's will, make people full of positive energy and reduce the difficulty of quitting smoking.