Additional toolbox. My small tractor came with a small tool box in the fender. I keep my gloves there. But it was not nearly sufficient for the tools I like to carry. I can't stand doing any kind of work and not have at least some rudimentary tools with me. What a waste of time to have to go to the shed because I do not have a simple wrench or screwdriver.
You can see I made a tubing bracket and attached a large tool box, the same one we use on all our field tractors. It has a top tray, enough room for an assortment of tools, and is quick attach bracket equipped if for some reason I want to take it off.
At a minimum I keep a 10" and 12" adjustable wrenches. Phillips and flat screwdrivers, WD40, Vise-Grips, a short alignment bar or spud adjustable wrench (adjustable wrench with alignment bar used in metal building construction), Zip ties, various hitch pins, diagonal cutters, pliers, hammer, tape measure, some baling wire and probably some stuff I am forgetting. That usually covers about anything I need to keep me from going to the shed. If it is more involved than what those tools can handle, then I probably just need to get my service truck.