Here is an interesting idea. Instead of using blocks of time an hour long to schedule things like meetings allow 30 minutes and get just as much done.
If you have half the time to accomplish something, you become hyper-aware of how you’re using that time. And hyper-focused during it. Most of my phone calls are now 30 minutes or less. My podcast is 15 to 20 minutes. Even many of my conference calls, with multiple parties, are 30 minutes or less. People on the calls, aware of the time constraint, are more thoughtful about when they speak, and more careful not to follow tangents that aren’t useful.