As an instructor, how to use the first day of class?

I found some relevant advice on the first day of teaching online (e.g. here, here, here, and here). Common themes include setting expectations, motivating the course content, and having two-way interactions with students.

Besides for reviewing the syllabus (and relevant university-wide policies referenced but not located in the syllabus), how can an instructor most effectively use the first class session? Are there any especially effective ways to do these things on the first day of a class?