Desert Blood Services will conduct two community blood drives tomorrow. Blood donations will be taken at the Hi-Desert Medical Center in Joshua Tree from 10 to 2, and at Vons in Yucca Valley, from 2 to 5 p.m. Donors will receive incentives. All prospective donors should be free of infections or illness, weigh at least 110 pounds, and not be at risk for AIDS or hepatitis. To make an appointment to donate blood, call 877-827-4376.