I would have a list of my projects with the expected due dates. For those that were easy and could have been worked on quickly, I made a preliminary list of these first and when I could complete them. Secondly, I made the second list and listed these in order of time to complete. As in the easy projects, I prioritized these and schedule time to complete. For those that I knew would take more than a few hours or a day to complete, I would consult with my immediate supervisor and then from there contact the requestors on the revised completion date. Sometimes more emergent situations come up so it is extremely important that all parties are notified of what's going on.