stop smoking

I dont know how to stop smoking. I only smoke in my job and at night. I work in a bar. I smoke + or – 10 each day.
I dont know what to do.
If somebody knows a methos for my case plase tell me. Or you can tell me something to do when i take a cigarrete.
Help please.
Thanks for reading .
Kiss :)

Hello, im from Peru. I would like to stop smoking. I dont smoke at home, but at work is really hard not to smoke. I work in a bar where most of people do that.
I’d like to read some things that you did in order to stop doing this. Please help me.
Take care, kiss.