After testing dozens of planners myself, my favorite ones are often either customizable or undated, making it easy to pick them up whenever you want. The world of planners might seem simple if you've only browsed your local Target or bookstore to see what planners they might have on hand. Updated March 2026: This guide has been reorganized and features the Cloth & Paper Travel Notebook as a new pick. Best Customizable PlannerThis year, I'm all about the travel notebook. A travel notebook uses bands to connect three or four notebooks together, and I love using this system to build a customized planner designed for my exact needs.