Here's what I recommended (and carry) for an individual first aid kit (IFAK):
Core trauma kit:
2 North American Rescue CAT7 tourniquets (no substitution), prestaged for one-handed application
2-3 packs compressed gauze, ideally one or all treated with a hemostatic clotting agent
2 pairs of vented chest seals
1 6" pressure bandage, "Israeli" style or similar
Trauma shears
2 pairs nitrile gloves
Mylar emergency blanket
Sharpie for writing TQ application time
Not core trauma but good to have:
2 Narcan doses
Fold-up plastic CPR mask
Dispersible (powdered) aspirin for heart attacks
Runner's sugar gel, for diabetic collapse
Triangular bandage, sterile if you can so it can double as an improvised pressure bandage
Ocular baggage
2 chemical hand warner pairs for helping with core temperature in cold weather
If you have the space and it won't limit where you carry the bag, a booboo kit:
4 Saline wipes for wound cleaning
Pack of large steri-strips for wound closure
4x4 Non-adherent bandage
2 Burn gel packets
4 Normal bandaids
2 Antacid pills
2 3" Pieces of kinesio tape for blisters (round the corners; stays on better)
For protests, add 1-2 sealed bottles of water with sports cap for eyewash (use only clean water or saline, never anything else)