I read your other thread...so you detoxed during an alcohol-induced crisis in hospital, that's why it felt, "easy." They heavily medicated you and kept you in until your withdrawal was well over. That's the biggest hurdle.
The rest is psychological. Have you been playing with the idea of having a drink at some point in the future?
Posting here never hurts, it is a way to keep my head in the game. For me posting is a daily reminder of a commitment. It's a bit like being on a diet or exercising. It's not just one and done, but daily vigilance and awareness.