Maybe these have been mentioned before, but I went through some 10 pages without spotting them outright. So will post them anyway:
Wheel barrows: You could make wheel barrows (out of 3 woods, 3 stone or 3 metal bars (or combinations?), that your haulers could then wheel around. It'd act like a mobile container, allowing them to put some 10 items in them before going off to the (D)umping ground or the stone stockpile, depending on how many things are assigned and how many things need moving.
Maybe assign them like you would dogs? Would prevent your craftsman to hog it even though he only brings a single stone over to his workshop to make some bolts.
Hauling multiple light and/or small things. Alternate title: Folding clothes: So a goblin dies in front of your gate. You designate his stuff to be grabbable, and then the dwarves come out and start looting it. It takes *months* to clear up several dead goblins' stuff. Why? Because a dwarf will head over, lift a goblin's right leg up, remove a single sock, then cheerfully carry it over to the clothes pile. I think a dwarf should be able to remove, at the very least, a shirt, a pair of pants, a couple socks, and put a cap on top and haul that little pile instead of moving by one by one.
Realistically, a single dwarf could strip a dead goblin (or captured goblin) and carry all of their clothes, minus weapons/shields or other heavier, iron stuff.
Could tie in with the wheel barrow idea, but I have trouble imagining a dwarf wanting to carry a single sock instead of a full pile. Economics-wise, it could count as multiple hauling jobs, since it's per-item, and they'd make plenty of cash hauling dead goblin stuff. Makes sense to me.
Daisy-chains: A pond to fill with buckets? A pesky hauling job (like dead goblin clothes)? Designate a daisy-chain! You could make a line, and the dwarves would line up as if stationed. You'd have the leader, next to the job itself, and you'd have the various dwarves leading up to where you want the hauling to start.
For the clothes idea, he'd take a sock, hand it to the dwarf behind him, who'd hand it to the dwarf behind him, to the dwarf... etc, who'd then put it in the stock pile, ready to accept the next, incoming sock.
For the pond idea, you'd have your chain going to the river or well, and a couple buckets would circulate back and forth.
..Probably kind of nightmarish to imagine dwarves doing, to be honest, but still throwing it out there.
Think that's all I can think of at the moment.