I've no problem with using LibreOffice for most of my document needs, but i haven't found a good substitute for microsoft's OneNote yet. I mainly use it to plan my RPG games and it helps a lot. What alternatives are there for organizing notes on linux, with similar features to those that OneNote provides?
10+ years ago there was something called Basket Note Pads that had the same blank canvas style note taking that onenote has now.
My heart broke in two when the project died because the metaphor wasn't popular at the time. It'd be so well positioned if it had stayed in development until today.