+1 Protestantpiper, that's by far one of my favorite Twain pieces.
For me, it depends on the week. One week, I'll smoke at least one bowl a day, two on others, with a cigar or two thrown in. The next may be so busy I don't smoke at all. So I guess the only conclusion I can draw is that tobacco use isn't habitual for me, at least at this point, but in the long term I smoke quite a bit.
Today, I'm pretty tired from two 2pm-12am days of helping a buddy move, have a day off work, and haven't smoked in a while, so I'll be smoking as much as possible.