Advanced Filters!
http://www.esoui.com/downloads/info245-AdvancedFilters.html
I think this is a must get considering inventory management is such a hassle especially if you are hoarder and loot everything in sight. It changes the UI and layout of your Inventory and Bank to add search function and also more specific filters. So now you can filter for specific items in specific section. For example different types of armor under armor tab so you can look for your helmets only choice. Who knows you have a whole wardrobe to show off :D