Let’s do this! When it comes to quitting, the sooner the better, but it’s important to pick a day that gives you enough time to prepare for the road ahead. Many find that a date within two weeks works best. Just keep in mind that it’s best to avoid picking a day that may be stressful or tempting, like a night out with friends or right before a big day at work. Once you’ve picked your date, write it down everywhere: put it on your bathroom mirror, your calendar, and any other place that will serve as daily reminders.