Never smoked a cigarette, haven't smoked weed in over a year, but since I was 16 years old, I have never been without a lighter on my person. You should always carry one.
I usually have one on me, seeing as they are about $0.25 and can be useful at times. Plus, it's always fun to light a classic Bic lighter with a flint.
Also, having never smoked a cigarette is quite impressive. I tried that one, but haven't smoked a cigarette since due to the lack of appeal of it for me.
Growing up around secondhand smoke was more than enough to keep me away from cigarettes, though I'm sure my lungs are fucked anyway. I find tobacco disgusting.