get an electronic cigar/cigarette. It actually ends up costing a lot less than smoking, and it's just water vapor and nicotine (which itself has no side effects), avoiding all of the carcinogens of cigarettes. Plus you can smoke them inside!You use cartridges which contain the nicotine mixture, it feels a lot like smoking and the act is the exact same. You can order set amounts of nicotine in a cartridge as well so you can adjust your nicotine dose downward to wean yourself off the physical addiction. then just use the cannabis to fill in the habit of actually smoking something, and if you are crazy jonesing for nicotine you know you are avoiding carcinogens if you use the ecig.I can attest to the success of this method personally. It was the only thing that actually worked (and I smoked a pack a day for twelve years solid. Longest I ever made it without was a week).