I find in tamping that is to essentially "stoke the fire" so while tamping also take a puff or three until you see smoke comming from the bowl or your mouth. I think for a long time I tamped when a pipe was starting to go out. But I ONLY tamped, and did nothing else. It seemed to work sometimes to keep the bowl going. On lighting I may light and Only tamp a few times. Maybe this is obvious to everyone else but I was thinking literally to tamp and no other action is needed.