> if you're hosting a meeting, only invite people who MUST [0] be there.

No! Do the opposite of this.

I enjoy the meetings where I can listen in and learn something from others. There can be a lot of value in these meetings — and if truly not, it is easy to slink away.

It is the meetings where the organizer thinks I "must" be there that are always a waste of time. Never fails. Keep me off these invite lists. They are useless.