I saw a really bad adventure/action movie in the '80s something about Remo, the adventure begins... anyway the point in his "kill all the bad guys" training was you always had a weapon. We all have the primary survival tool with us at all times & that's our brain. The more training, education and experience you have the better.
While I've got a 'get home' bag and/or BOB as the situation warrants in my truck all the time; were I not able to get to it, I can adapt what I find to help me cope with whatever situation develops. So I try to be aware of my area of operation and what is usually around that I can grab and use what is there if there is nothing else I can do and an emergency develops.
Think 'outside the box' about everyday items. Example: when I worked in a prison, my #2 pencil was a last ditch weapon if I needed it so it was always sharp and parked on my left ear - nobody ever noticed it and I could put it into a vital spot in a second if needed - old corrections officer trick. I also would be able to write with it, use it for tinder (shavings) lube locks (graphite in the 'lead') use the eraser to plug up a hole in something... you get the idea. Also, while I've been an EMT, officer, instructor and such and don't "need it" my company is going to offer CPR next month and I'll sign up to take it - it will be a great refresher for me and a chance to practice my skill set. It's mostly a head game and if you have your head on straight, you have the best chance to "win" the survival game!
Paul -