Users allocated VLBA observing time, either on fixed dates or for the dynamic scheduling queue, will be sent instructions for preparing observing schedules. Approximately 65% of all VLBA observations are scheduled dynamically, based on array and weather conditions predicted 1-2 days in advance. Help with preparing VLBA observations is available through the NRAO Helpdesk, at http://science.nrao.edu/observing/helpdesk.shtml.