insert more tokens.
Seriously though, this strikes me as something that more a problem when dwarves construct themselves into a coffin, or channel themselves into an isalnd. If I may make a few suggestions to the op/anyone else having the problem:
1. Set hotkeys... if you have large construction projects going on in disparate parts of the map, hot key them. Check back periodically to make sure dwarves are on task, and not trapped in a room (there are also some cases where a tree grows and blocks an opening - lay down some flooring after you cut it down)
2. Check idlers... It's a pain with no easy scrolling and a fortress of 130+, but you should probably have a rough idea of who is doing what and how many should be idle... check periodically that dwarves are on task and not idling about. An idle miner when you know digging tasks remain is often an indication that a dwarf has channeled himself onto an island, etc. Personally I keep all the dwarves working most of the time (particularly on easy-repeat tasks) so idling is a trigger of sorts for me to know when to change jobs, set new tasks, or check for dwarves who installed floodgates incorrectly =p
3. Set medics... look for dwarves that find helping others rewarding. Make sure they dont also have tags for procrastination, minimal work, and "not easily moved to pity" / "Unmoved by the suffering of others" (it's all very contradictory, but babies drink booze from birth, so....). Set health care (and animal care if you want) and cleaning to the only tasks active for the dwarf/dwarves. They'll idle normally (or else harvest crops and check their stash and so forth), but they'll regularly supply food and water to the injured and often rescue them as well. I don't think it helps with trapped dwarves (Pretty sure canceled task msg is not generated), but it might help with your injured hunters.
Btw, make sure your hunters have quivers, backpacks, waterskins, and ammo. Otherwise, they try to punch or club things to death, and it usually doesn't work out so well.