There's so much to do at the beginning of the semester. One thing you _don't_ have to do on the first day, is have your office hours set. Instead, let your students help decide them.
Do you ever get tired of being asked when you'll be done grading something? Here's how to use Trello to create a public grading status board that gives students the info they need.
In this second post on GTD for academics, we look at the question of knowing what to do with our time, why a system for helping us decide is important, and what a good system looks like -- and doesn't look like.