When it's items i have a feeling might be used in a quest or know they have a use i'll always keep them at 100. ie. i have 436 live coal that are used for the SM quest, i'll NPC 336 and just leave 100 for anyone that needs them.
Tips for keeping your storage clean:
-Look up the list of items needed in hatter quest
-Look up the items needed in common quest
-Having more than 3 of the same equipment for a quest you wont really do is not very productive.
-If you have all the items needed for a quest and have the free time, do it, it will make some room and get you something shiny.
-Slot/Enchant/over up equipment you might find useful but don't use.
Once you've gotten through your whole list of junk and identified the useful things, NPC THE REST!!!
