Doing a bit of renovation at home and discovered that barefoot is a great way to accomplish this. Not only are feet easier to clean than socks and less messy than shoes (we don't have shoes indoors due to Asian tendencies) but you can utilise toes for grabbing hold of pieces of skirting board as you saw them at 45 degrees without using a specialist tool. Perhaps I should get one of those angled cutting guides, but this worked just as well.
Sawing barefoot? What could possibly go wrong.