Be prepared, think ahead, plan, work your plan.
Self Defense begins with paying attention to your surroundings. LEO ( Law Enforcement Officers) Military, and professional Self Defense instructors give it a tactical moniker called SA for situational awareness.
You may not be a LEO, 1st responder or Military operator but paying attention, employing awareness, along with having useful tools for an emergency are a good idea.
Cell Phone, Tac lite ( small flashlight) Tourniquet are excellent tools to carry at all times. The flashlight can be used for obvious reasons as well as for self defense, its legal. Ditto a "tactical pen" sturdy pen.
Car accident, motorcycle accident, household accident, knife attack.
This is as real as it gets. Better to have it and not need it, then to need it and not have it.
Warning! This is graphic
Carry a tourniquet even if you aren't armed, you might save someone’s life.