I'm starting the game again and after selling off my Blood Swords in FFII without realising how good they were, I am looking for a list of things I really shouldn't miss and, if unique, things that look useless that are actually really really useful. Now, I've played through a bunch of FFVI before and remember a fair chunk of major events, but to be on the safe side I'd rather the list be spoiler-free if possible.

Can anyone help? For what it's worth, if there are multiple versions, I'm playing the one you can download from the Playstation Store (PSN). At the moment I've just arrived in South Figaro, so hopefully there wasn't anything too important that I've already passed by.