It's because I feel this way about the first week of classes that I was so excited to be on sabbatical last fall. You see, the first week of classes at my uni is always the same week as Burning Man. Now, whatever your personal feelings about Burning Man (dirty hippies, drug fueled orgies, etc.), know that for me, it's an important and transformative experience. I come back refreshed, at peace with the world, patient, calm, and willing to take on everything that life throws at me. And until last year's sabbatical, I had to miss this experience every year.
So I've come up with a plan. By next year, I hope to be tenured (chances are high, according to my colleagues), and so marginally less dependent on the goodwill of the students. Our uni also has a real hard-on for innovative teaching techniques and integration of technology in the classroom. And I'll have two teaching assistants. My plan, therefore, is to pre-record my first two lectures and have the TAs show them in class, with breaks for discussion and small group activities. That way, the students will see my face and know I care, and hopefully learn something.