I've been finding with the database that some of the best and easiest things to do (if you don't use or own Excel like me) is to basically calculate out how much equipment/items/states/spells you'll be using. With a rough calculation, you can easily split up the 999 max slots under these areas to cover all the stuff you want to mess with. I've been using "Dividers" in my lists to easily find what I'm looking for (essentially, it's a blank entry with all null values and just a name that tells me everything under it in the list is what the heading says it is). For example, my skills are split up into categories based on character. After the first four slots (the first slot is the default Attack command, the second slot is the default Guard command, the two slots after that are for different basic attacks that don't fit into a category and can be meshed across all characters), I have the header "---Adrenaline---". All 60 slots under that are dedicated to Adrenaline Skills. After that 60 slot mark, the next header is in position. It helps let you know how many spare slots you have for last minute additions and gives you a bit of room to work with. My weapons and armors (which I never fully fleshed out initially, 'cause my game is intended to be fairly lengthy) are split into manageable sections based on desired amount. I split my weapons up by weapon type (Sword, Staff, Bow) and split up my armors by type (Cloth, Chainmail, Platemail). Naturally, with my armors split up by type instead of equip slot, I have to include helms and such under those sections as well. Don't worry though, Shields get their own sections in Armor. Accessories even got their own section.
It's all fairly time consuming, but once it's done, you don't have to do it again. You just have to pull the database up and make a new entry in the appropriate place, and bammo, all done.
Here's something I do recommend you do before you delete anything though. Seriously, you need to. You should look at all the existing entries and see how they work. Yes, that includes states. Look at them all to get a good idea how these things are accomplished or how they are unique. This information will be invaluable after you start deleting stuff to make room for your own touches. Especially the states! I can't stress this enough, look at the default states and see how the affects are accomplished so that you can either edit them in the future or make them yourself.