Donating blood is a simple thing to do, but it can make a big difference in the lives of others. Wendy Mambru of Reading, diagnostic technician for Miller-Keystone Blood Center, assists Vicky Smith of Palmerton, left, with her blood donation. The Carbon County Chamber of Commerce, 110 N. Third St., Lehighton, sponsored the blood drive for the Miller-Keystone Blood Center on Monday.