Wow........one smoke is great!!! Don't let the cravings get too bad or you might get too frustrated and smoke more. Everyone is different. For some if they have that first one, they'll smoke the whole pack. For others the feeling of depriving themselves, makes them want to give up on vaping, but if they'd smoked one or two when they needed em, they wouldn't feel deprived. Find out what's right for you, just don't feel guilty!! You're doing great!