On one side, I have a bucket with some random tools, tape, measuring tape, tire chocks, etc... I have 4x6 blocks that are 1-2' long for use in hitching, stabilizer jacks and hopefully not used for helping to change a tire. I store my WDH stuff in there when not in use and the rug for outside the door. On the other side, I have the 50amp hose, sewer hose, water hose and any accessories that go with that.
I used to have all kinds of random just in case camping stuff in the middle, but I never used it, so I Did away with it. I'd actually like to move more stuff OUT of that space to reduce tongue weight, but can't find a practical place to keep it.
I wish TT's had more storage under the RV like a motorhome has. Not because I want to take a bunch more stuff with me, but just to be able to spread out weight better and not put things like my Road Trip grill under the RV rather than in it.