I'm in the same situation as a few of you - smoked for over 10 years, a couple of half-hearted attempts at quitting.
So far I've found - the gum & inhalators taste like shit! (will see if can get habitrol here though - sounds like it's worth trying, good tip!) and the patches are great - for long flights! They don't deal with the psychological aspect of it at all - half the time I'm smoking for something to do when I'm working, driving, reading, thinking, etc...
A lot of us work for ourselves from home - so it's a lot easier to smoke as and when we want than if we worked for someone else. For me that means I get through 50 a day. I smoke rolling tobacco from Belgium - a bit less of the crap that's in normal fags and not £6/$12 a pack! (20 a pack - that's the same in the states isn't it?).
That book sounds worthwhile, but does it deal with one of the biggest issues for me and some mates - how do you stop smoking cigarettes/tobacco but continue enjoying smoking joints? Pipes, bongs and neat spliffs are too... intensive - get ya too wasted way too quickly.
Aden, I think a lot depends on your mum's personality. She might respond to shock tactics and guilt trips, she might not - I don't know her. From reading this, the advice that would benefit most people seems to be about the habitrol gum and that book. I've no experience with either, yet. But this thread and the ban in pubs coming in here in a few weeks have motivated me to check them out!