Crack seems to be a dangerious drug. I never seem to know what is enough. How often do you take a hit? If I try to tell myself no more then every 10 min, I find myself watching the clock, wanting to do more. Part of me want more and more. Another part knows better. I'm afraid if I keep doing more, I could do damage to my heart, or other problems. Maybe it's best just to let it be, at least for a while.Is anyone here able to just do it occasionally without problems? How often do you take a hit? And when do you know it's time?