I used to smoke a pack a day for 12 years, I have been slowly quitting. I just cut myself back, so far I am not 100% smoke free, but I am getting there. When I got my BFP 5 years ago, I was able to quit, but when I miscarried, I went right back to smoking, so I know I can fully quit if I get that BFP, and going to my first RE appointment on friday, is also helping me quit now.
I have the electronic cigarette, but it doesn't fully satisfy that craving. I have been using the Life Savers Pep-O-Mint mints to help, when I get a craving for a cigarette, I get one of those instead. Everyone is different though, what worked for one person to quit, might not work for you, you gotta find what works for you.