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. We recommend setting your quit date within 30 days, and many find that a date within two weeks works best. It’s better 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, post it everywhere: on your bathroom mirror, your calendar, and any other place that will serve as a daily reminder.