I'm sure you'll manage it, Atheist. I managed to give up when I was pregnant with my 2nd child, just over 40 years ago. I was a fairly heavy smoker though. Teaching in really tough schools had a tendency to teach you to smoke 3 fags in 15 min. breaks! Never mind the packet of 20 in an evening when marking. There weren't any 'aids' in those days.
To answer your question, will-power is essential. The tricky bit is after about 10 days when you think you are doing really well and have 'cracked it' - that's when it sneaks up and pounces.
Money helped me, amongst other things.
I worked out how much I was spending on fags per day, week, month year and made labels stating this (1 label each cost). I stuck them everywhere around the house, in the car and on the back of No.1's pushchair. I also made labels of other reasons I should, and wanted to, stop and they were plastered all over the place as well.
So, whenever a craving got to me I could look straight at a d**n good reason not to give in to it. Hope this helps, good luck. I was mildly surprised 20 yrs.later to get a craving, but they seem to have stopped now. :)