Welcome, Nalada, well done! In my experience, there's nothing wrong with saying "I'm quitting for life". Absolutely. Some people are more comfortable with "one day at a time" and for others, that seems to leave the door open in a way that isn't helpful. It's whatever works for you. Read around the various sub-forums here ... there is a ton of good info on the various ways people have quit and started building a better life. I wish you the best, and we're here to support you.