Most people who have quit for good have had to try several times, so don’t be discouraged.  It is helpful to remember why you slipped and try to think of how to cope with that challenge if you face it again.  Think of your previous attempts as "practice" for the real thing. Think of the things that have helped you and the things or situations that made it harder for you. Your experience actually teaches you something valuable that you can use the next time you try to quit smoking.