I do it regularly and it has nothing to do with needing a practice shot or not being confident or any of that. I do it to loosen up my muscles. I do it torefresh my muscle memory. I do it to make sure I haven't bumped anything off. I do it to make sure I am not having any string slap when I have on heavy clothes. I do it to be sure my cam isn't going to bump my climber top if I shoot at certain angles etc.