Meeting time is expensive and most of it is wasted for reasons that are consistent enough to be addressed directly.
First, decide if it should exist
A meeting is for discussion where the back-and-forth matters. If the purpose is to convey information, write it. If the purpose is to record a decision already made, write that too.
The test: could this be a document that people comment on. If yes, it should be.
State the outcome, not the topic
An invitation saying quarterly planning tells nobody what is meant to happen. One saying decide which three projects we fund next quarter does, and it makes it obvious whether the meeting succeeded.
Invite fewer people
Everyone who can contribute to the outcome, and nobody else. People who need to know can read the notes.
Attendance out of politeness is the largest source of wasted meeting time in most organisations.
Send the material in advance
And expect it to be read. Reading a document together in a meeting is the most expensive possible way to read a document.
Some organisations open the meeting with silent reading time, which works better than hoping.
End with who does what by when
Explicit, written, and shared. A meeting that ends without this generally did not accomplish anything, whatever it felt like.
The default that helps
Shorter slots. Work expands to fill the time booked, and a twenty-five minute meeting usually achieves what an hour would.
The one that costs nothing
Cancel the recurring meeting that has no purpose this week. Nobody will complain.