How do you know what to keep and what to get rid of? Pretty much have both my retainers filled with crafting mats(minus about a pack and a half keeping more of the unique loot in) and my gathering professions are all 25(ish). o_O

Am I keeping too much, am I gathering too much, I'm being overwhelmed by the quantity of materials here and I can't tell what to do with it all. I'm worried half of it will be like Iron Ore where I had to gather a crap ton of that for iron bars, and then go back and gather more to make steel. So now it's sucking up space as bars of iron and ore while I try to raise my skill more to get the bomb ash I need to make that ore into steel. I'm pretty much ready to throw the towel in on cooking and fishing, I think those are half my storage problem as is. But then again I needed those little yellow fish(yay for alch vendor) for those smithing patterns and no idea which (if any) fish I'll need to grind into paste to hold the next weapon together.