The 80/20 Principle by Richard Koch explains that both life and business are surprisingly in an unbalanced state: 20% of our work leads to 80% of the outcome; 20% of our customers bring 80% of the profits. Therefore, we don’t need to work with everyone and work on everything. The 80/20 principle suggests reaching out to the 20% most valuable customers, spending time with 20% of people who care about you, and working on the 20% of tasks that lead to 80% of the outcome. 

Because of the 80/20 principle, we would rather work smarter than harder.  It reminds there are ways to get things done more efficiently. ​

The New One-Page Project Manager by Clark Campbell and Mick Campbell reduces the project plan to a one-page document, a structured report that can track and report the project performance.

 Report creation takes 12 steps (summarized in ​Step 3 - the content matrix) :

• ​Project Basics (Step 1): Project Name, Project Manager, Project Objectives, Report Date
• Objectives (Steps 4): Project objectives 
• Tasks Management (Step 5, 6, 8, 9): tasks name, objectives associated, the schedule of the task, owner/helper to complete the task. 
• Risk Management (Step 10, 8, 9): risk name, the schedule, RAG status  and owner/helper to mitigate the risk. 
• Team Management (Step 2): Owner and helper of the project's tasks (Note: The author suggested using A, B, C to specify the ownership order and recommend that one owner per task is preferred.) 
• Cost Control (Step 11): showing metric for cost measurement 
• Project Date (Step 7): cadence of the report
• Summary and Forecast (Step 12): overview and forecast for an executive to capture the key message. 

The steps covers the essential project management principles. The book also emphasizes that keeping project plan/status transparent to the team and stakeholders is always project managers' top priority.