Good graphics are crucial, especially for urgently-needed Powerpoints, but when you’re in a hurry you can’t always find the picture you need. Just searching in Google Images is hopelessly hit-or-miss – and most of what you find there will be copyrighted anyway. Instead, try searching in AllOurStock, where everything’s copyright-free and instantly available. Some of it’s their own, some is harvested from free sources across the Web. If they can’t help you (which is unlikely) there’s a similar service at Stockvault.