When it comes to organising your inventory in W3, it's a bit of a mess. If you've come across any number of enemies and simply hammered X/A to pick everything up, the moment you bring up the list of acquired materials is just one giant grid of everything in your possession. A pretty annoying thing thereafter, is that the game can never decide if an important note is a 'Quest Item' or a 'Usable' one - it tends to differ across almost everything you pick up. Anyway, as much as it's tempting to just leave things like "Random Note" to the wayside (as is per the usual in the genre) they can occasionally lead to very rewarding sets of items, character interactions and more.