It's a strange thing (or maybe it's not), but starting this thread, and the wisdom and advice therein, have allowed me to dramatically cut my amount of gum.
It's 7pm here, and I've only had 1 piece of gum all day! I'm yearning for another one right now, but I'm not giving in because it will pass!
Having said that, writing this post (and thinking about it) makes the urge stronger.