Pick a quit date. Let your friends and family know that you plan to quit the habit. Withdrawal symptoms include feeling irritated and annoyed. If your friends know why you are having mood swings, they're more likely to be understanding and supportive.

Use nicotine replacement therapy, known as NRT. Replacement therapies like the patch, gum, lozenges and inhaler contain a small amount of nicotine, explains the Mayo Clinic. They work by reducing nicotine cravings and minimizing withdrawal symptoms. NRTs also increase your chances of kicking the habit for good.

Get a prescription. Effective medications used to treat dependence on tobacco include bupropion and Chantix. Bupropion works by minimizing withdrawal symptoms. Chantix helps minimize withdrawal symptoms, but also blocks receptors in the brain, according to the Mayo Clinic. So if you do relapse, the nicotine will not stimulate receptors in your brain the way it did in the past.

Join a smoking-cessation group. Nicotine Anonymous is a group of men and women that help each other live nicotine-free. The NCI offers real-time text messaging with a smoking cessation counselor. You can also call (877) 448-7848 to talk to a counselor. The Department of Defense offers programs for members of the military and their families.

Keep busy. The American Cancer Society suggests frequenting places that ban smoking like museums, malls, churches or movie theaters.

Spend time with supportive people. Withdrawal symptoms are more likely to occur, or will feel worse, when you're alone.