I cracked again on Saturday shortly after my last check in, but unfortunately I didn't have a good reason - nothing bad had happened in my life, and there was nothing that drove me to do it. I know why it happened though, which was that I hadn't been able to go running for a week and I was a bit unstable because I'd been so sedentary for a week...
People who are not addicted have also been reporting the fact that sedentary lifestyle definitely makes them lose focus. You have already completed 1 day, let build it up to break your longest streak.