Syllabi are copied and rosters are printed out (after a brief moment of frustration when my computer insisted on printing out the class rosters roughly two inches tall--I'd need an electron microscope to read those names!). There's a nice spread of muffins and fruit in the department office to welcome back my wonderful colleagues. The bulletin board is finished, books are in stock, and this morning's lesson plan is all prepared.
There's just one thing lacking: the students. They're the final element that will make this day complete.