I like the survival streamer idea. I guess that could also include a smoke flare or dye marker also. As more people post I'll try to keep a running list, so far
handheld GPS
Personal EPIRB
Handheld VHF
Rope
Multi tool
First aid
Survival streamer/ Smoke flare / Dye marker/ Flares
Water Rations/ Food
Pic for reference
