Please don't judge, but have question??

I am due Dec 25th, which makes me roughly 9 1/2 weeks. I am a smoker and have cut back a lot, like from 3/4 of a pack a day to 4-6 a day. I know it's not healthy for me or baby. But I know I can not be the only mommy to be who is having a hard time quitting. For those u have quit during pregnancy what made it easy to quit?