Find a healthy snack food you can carry with you
In place of smoking cigarettes, try sunflower seeds, sugar-free lollipops, or gum, or carrot or celery sticks if you’re concerned about weight gain. You can also switch your cigarette habit for a nut habit, and eat four nuts in their shell for every cigarette you want to smoke. This way, you’re using your hands and your mouth, getting the same physical and oral sensations you get from smoking.
Switch to a cup of herbal tea whenever you usually have a cigarette
The act of brewing the tea and slowing sipping it as it cools will provide the same stress relief as a hit of nicotine. Or carry cinnamon-flavored toothpicks and suck on one whenever a cig craving hits.
Instead of a cigarette break at work, play a game of solitaire on your computer
It takes about the same time and is much more fun (although, like cigarettes, it can get addictive). If your company prohibits games like that, find another five-minute diversion: a phone call, a stroll, or eating a piece of fruit outdoors (but not where smokers congregate).