>There was a (short) time that I smoked 10 cigarettes behind my computer in an hour. (I'm not saying here that I smoked 80 or more cigarettes a day.) It gave a feeling of concentration, but the fact is that it really only blurred my mind. One day I decided to stop smoking. After a week I could confirm that my mind was much clearer now.
>

Maybe you might have a nargile. :))

http://www.turkeytravelplanner.com/TravelDetails/Tobacco/Nargile/NargileMain.html