My experience is that those "tried quitting for the first time on a whim and it was surprisingly easy" situations can trick you into thinking it would be just as easy to quit again if you smoked again for awhile. I did it myself. Unfortunately, its REALLY usually not that easy. Sometimes you luck into the perfect moment where you're totally mentally ready and no major life stress is happening and it all just kind of falls into place, but the vast majority of the time (for me at least) it ends up being a massive struggle of will power and a hellish, viscious cycle of swearing to myself that I'll quit, slipping up and smoking again for a few weeks, feeling guilty about it and getting down on myself, then trying again. Again and again and again. Its so draining. You end up hating it so much, but just can't stop and resist the subtle pull of 'just having one once and awhile'. I've been trying to get myself back into a long streak that feels like a permanent quit for years (and years) now. Don't waste what you have now! Don't get into the viscious cycle hell of quit and relapse!