Combination of my old boss getting sacked, my new boss taking a while to get comfortable in the role, work stress, family stress...you know, the usual :)
New boss has settled in, so that shouldn't be an issue (fingers crossed), I'm taking measures to cope with the work stress, and I did my trip home in the summer, so I shouldn't be seeing my family until 2014. (I kid, I kid - the trip home was for my sister's wedding, and most of the stress was related to that joyous event.)
I don't know - aside from the Champix-related nausea that still surprises me every time I take it, I'm doing well this time. I'll occasionally be watching a movie or reading and think, "This would be the perfect time to pause and go for a smoke," but then I remember I'm not doing that anymore. It was very helpful when the temperature dropped to the -40s for a week and I wasn't even tempted to go outside for a "break." :)