Item deliveries. Take a container (perhaps locked/secured?) of some kind that contains an item from one place to another. Or just an item itself. Either because you don't get to examine the item itself or because the item has a history to it that you can't easily derive, your task may be mundane ("This flour needs to be delivered to that settlement, they're running out and need to make more bread", "my Old Auntie wanted me to pass this small ring onto my cousins, as she knew they liked the colour") or something more ("Oh, pish-tush, it is but a mere everyday sample of my gemstone art, within this box, no, of course you won't get any problems, it's not like it's particularly valuable or sought after, or anything... just be aware of the hordes of bandits and brigands that seem to be converging upon the roadway betwixt here and your destination", "Please be careful of the amulet you are taking to my Liege, for he has a particularly.... sentimental attachment to it, and would visit foul murder upon one who happened to... 'lose' it...").
Not to be overused, of course, as a "fetch'n'carry" repetition[1] would be no fun, and I dare say that there might be parties who would approach you (especially if you're of a high-enough level) with a request/entreaty/order/suggestion that you 'complete your quest' by giving the item to them, instead, for the better of (almost) all.
But I'd also like the idea of rendezvousing with someone, who might have a (as yet unknown) further task for you. (Kill? Courier? Communicate?)
[1] "Deliver this rock! Deliver this egg! Deliver this rock! Deliver this tuppence! Deliver this vest! Seek the Ostentatious Festoon! Deliver this axle! Deliver this anvil! ..." To quote my Gyrognome Inner Mason's recent quest-list.