Quitting any addition is not easy you have to be determined and train your mind. Remember one thing in mind that nothing is impossible.
Write down your goal every day. Remind your mind everyday that you can do it.
Talk to your doctor about the options that are available to and appropriate for you.
Indulge your-self in some sports activities and make yourself busy at all the time.
Spend quality time with your family to overcome the addition.
Talk with some good friends or If you have bad company make new friends who are positive, who do not drink or smoke or who do not have any addition problem.
Love yourself enough to stop yourself from doing damage to your present and future.
Change all your bad habit and replace it with new and good habit like meditation, yoga, eat healthy and balanced diet, drink juices, watch good movies and shows, watch news and sports, take 8 hours sleep daily, listen some good music everyday to get rid of any disappointment or depression.
Following these simple steps daily can really help you to control yourself from any addition.