I've mostly done my planning in word docs and on scrap paper, but last year I started using a notebook to map things out before vacations or around benchmark exams. I tried a few different layouts that I drew into my old notebook before settling on one to design for my new notebook.
Two week spread doc
Right now this is the only thing I'm planning to print to put into my notebook. I have the to do lists and lined pages that come with the notebook plus some blank pages (TMC notebook sheets I hole punched!). Is there anything else you would consider essential in your notebook/planner?