OneNote is by far the best electronic note-taking and organizing tool out there, in spite of many glaring shortcomings. (e.g.: It
really needs a way to tag things, as the full text search quickly becomes less useful as you pour more of your life in it, especially web clips; also need real tree-structure organizing that lets you go deeper than just Notebook/Section/Page; UI is a disaster for pen/touch use since removing radial menus, etc.) It's the main reason I will
never go back to a "caveman laptop" w/o pen support. I just wish MS would really put serious effort into OneNote as a product.
That said, I capture critical ideas and project and research info in OneNote, but still use a plain old notebook (using a system I made up myself similar to the old Franklin planner and Bullet Journals) to do much of my ordinary day-to-day notetaking, planning, and task management. The truth is, there is NO electronic "day management" system available today that is even close to as good as what Palm had 20 years ago.