In reply to UKC Articles:
One thing that doesn't seem to get a mention when people move outside is the need to keep the soles of your climbing shoes clean. So much rock erosion has probably been caused over the years by climbers setting off with muddy or gritty shoes and grinding the rock into the polished state we see so often now. It doesn't take too long or much effort to carry a rag (I still use a beer towel) and simply wipe the soles of your shoes before the start of each climb. If my shoes are really dirty, say after walking back down to the base of the route, I'll use water from my drinking bottle on the rag too. And not only does this help the rock, but just as important your sticky rubber will now actually be sticky and help with your climbing!!