Terry -
It's really going to be determined with the particular type of chores you do on a regular basis. I suppose, however, there are certain items that would be good for just about anybody to have with them. For example, a first aid kit was the first thing I put in there. Only needed it once so far, but it was nice to get a band-aid on my boo-boo and keep right on working. /w3tcompact/icons/crazy.gif
I started out carrying gloves, but I seem to wear them virtually all the time, so they don't really need to be in the box.
Handy tools -- I carry several wrenches, which allows me to tighten or adjust just about anything on the tractor. Also a good-sized ball and peen hammer in case I feel like beating on something. /w3tcompact/icons/wink.gif
Pliers, vice grips and wire cutters come in handy for odd tasks, especially those involving wire fencing.
Spare parts - hitch pins, clips, sheer bolts, etc. Anything that will keep me out in the field longer.
Chains - One of my ammo boxes has nothing but chains in it. The toolbox has an assortment of hooks, quick-links, shackles, etc.
Baling wire and duct tape - Need I say more? /w3tcompact/icons/laugh.gif
Walkie talkie on my hip and a whistle around my neck and I'm ready for anything.
Still need a good, safe way to carry my camera. Who knows? Someday I might want to snap a picture for my TBN buddies. /w3tcompact/icons/wink.gif