I operate a policy of having days in which I try hard to not have meetings. If you're reading this, chances are you've looked at my calendar and are wondering what kind of meeting takes all day and happens so frequently. It's not an actual meeting, it is a reservation of the day.
When you're operating on the maker's schedule, meetings are a disaster. A single meeting can blow a whole afternoon, by breaking it into two pieces each too small to do anything hard in.
— Maker's Schedule, Manager's Schedule by Paul Graham
Currently, I run a delivery team with lots of deadlines and very little time available for non-delivery work. This means every week I have one day full of team planning and line management meetings, leaving four days open to work. I try to reserve two of those days to do coding and thinking and solving hard problems. Otherwise I get nothing done other than email and meetings.
If you still need to book a meeting with me on a reserved day, go ahead. I'll accept it if I think it's more important than having time for coding and thinking and solving hard problems.