I'm Trying to Quit Smoking, What Can I Use Instead?

I'm addicted to smoking. I think I'm more addicted to the actual act of smoking (inhaling and exhaling smoke) and constantly holding something between my fingers than I am to the feeling. I'm going to test this theory out by smoking a substance that I can safely (well, something that wont kill me) inhale and exhale. What is something legal that I can smoke that isn't addicting and won't change the way I feel (i.e. make me relaxed or high)? Thanks