This is a list of PM ideas that should be extinct. And if they are still rearing their prehistoric heads in your organization, perhaps it's up to you to lay them to rest once and for all.
What project management ideas do YOU think should be extinct?
Your action: Find a better PM tool than email.
Your action: Cut down the length of your meetings, and use a timer to enforce it!
Your action: Every time you recruit for a job, consider not requiring an onsite presence. Include the line "Remote work possible for the right candidate."
Your action: Have a complete project plan, but be ready to change it up. Changes are not evil. They're challenges and opportunities to deliver better outcomes.
Your action: Complete every project brief/task description and communicate with the team BEFORE the project starts!