I used to at my old job but this one is a lot more important / dangerous so i never smoke before working. I only smoke it on the weekends. Back in high school i would get high before having to speak in front of the class. If i ever to go a bar and hit up girls my stutter is very bad. But if I'm high it takes the edge off. I wonder if i have just convinced my mind that it helps. Also i haven't smoked weed for about half a year due to these drug tests. The reason i mentioned my job in the post is because weed stays in your system for months, not because i want to work while high.