Sounds familiar! I find it's easy to swear off alcohol the day after a bad drunk, but it is definitely more difficult after a few days have passed and it's a sunny Friday or Saturday and the lingering effects of those Facebook photos or those cigarettes or whatever else aren't in the fore front of your memory. Like someone else suggested, it would probably be a good thing to save your post and put it somewhere easily accessible, like your phone or your email, and read it every day for a while, just to keep those reasons you want to quit fresh.