[OKSooner]

Also as long as I'm making the request, any other suggestions for small, lightweight useful items are welcome. For example, today at the appliance store with Mrs. Sooner, I caught myself needing a small tape measure.

Oh, yeah. Multi-tool, anyone? Serviceable but not too much added weight, reasonable price (Not a $200 unit like some that you see around), and NOT with a set of driver bits to go with it.

TIA!

[thefactor]

North American Rescue tourniquet.

https://www.amazon.com/North-American-Rescue-Military-Issue/dp/B003EGD8YC

[Maigrey]

I carry a fully equipped first aid bag in my car and if you're looking at a small one - I'd suggest:

a roll of gauze,
duct tape (it's a dual purpose product),
splints (for immobilization),
4x4" pads,
tube of topical antibiotic ointment,
adrinalclick (the alternative to EpiPen mess),
aspirin (for MIs and possible MI's),
blade to cut anything (with a potential serration for cutting a seat-belt in an emergency),
oh and if you do have room, a pulse oximeter (it measures O2 in bloodstream and also heart rate ('cause measuring it in a crisis when you've not trained or practice is a nightmare)

... and maybe a couple of emergency space mylar blankets

I have a BP cuff and stethoscope but that's just me. It's entirely up to you on how prepared you think you might be.