Change perspectives. Whatever successes or failures you've encountered in the past, take lessons from out of it and motivate yourself to do better each time. Then, you would be able to focus on whatever it takes to get to your desired goal. If you find something isn't working in your efforts toward the goal, evaluate and change them if necessary.

Most  people experience the following symptoms when they try to quit smoking, all arising from the lack of nicotine in their blood stream: Irritability, anxiety, depression, and a craving for nicotine. Take professional help to fight this.