Tomorrow I give up

I originally had down 26th July as my give up date. I planned to cut down my smoking and hoping it wouldnt be to hard to finally give them up. Well this has not happened. I have not cut down at all, mainly due to stress. But then, last night I was sitting outside having a smoke. And I said to my fiance, thats it Wednesday I dont have to go anywhere. Thats the day I am giving up. I am having some money issues, and I guess bills etc etc are more important then putting a smoke in my mouth. I am really really nervous that I wont be able to do it. I am such a routine person. I get up and go out straight away to have one. I need money and this is the only way I am going to get some. So I was hoping for some advice on how not to pick up that smoke and how to beat the cravings...