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

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?

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

Are there any especially effective ways to do these things on the first day of a class?