1. Establish why stopping would be beneficial - If you want to break some bad habits that are harmful to your health or to others, you already know that doing it isn't good for you. Write down the habits you wish to change and list what good will come from those changes. Once you see them on paper, you'll realize they are much more hurtful than you might realize. Find reasons to stop!
2. Reward yourself - Once you break one of the habits you have, reward yourself something special. It doesn't have to be expensive, just something that you would really like to have. Rent a movie you've wanted to see and for the bigger things you accomplish, take a mini-vacation for the weekend.
3. Educate yourself from those who are successful - Buy a book, read an article, or search the web to find those who have achieved success and find out how they did it. I'm sure they had to overcome some habits on their road to success. Find out what they were and follow their lead.
4. Start out small - Don't try to do everything at once and don't start with the things that are huge. Start out small and work your way up. Set yourself milestones and make sure you keep to them. Reward yourself when you have accomplished each little target. Be careful not to overwhelm yourself otherwise you will just get frustrated and will end up giving up.
5. Break it down - If you tend to procrastinate then break down those larger projects into smaller ones. It makes the big one seem less intimidating, but you will eventually get the project done and probably in less time that you would have if you tried to tackle it all at once.
6. Make your goals for quitting realistic - You have to set goals for breaking a habit realistic. It takes twenty-eight days of doing something for it to become a habit, so make sure to invest those twenty-eight days into whatever you've decided to quit doing.
7. It is important to find a replacement for these bad habits (of course with a good habit.) otherwise there is just a void and you are used to doing something. Identify yourself with success, believe in your self and create positive attitude to changing your bad habits.
8. If you want to break the bad habits then stop identifying yourself with them. For example, stop thinking of yourself as a smoker and more that you smoke, it is an action not an identity. As soon as you think of it this way you will find it easier to stop. Changing an action is easier than trying to change a characteristic.