I'm so incredibly aware. My phone is always in my back pocket (charged), car keys in my right, and most likely my debit card/anything else important in the situation in my left pocket. If possible, shoes are on (likely wearing something practical or easy to slip out of so I can run barefoot) or, I am aware of where I've placed them for quick access. I watch everyone in the room - behaviours and things they say. and where they place things. Especially if there's something helpful to note (i.e. lock for the backdoor). You'll never find my stuff just 'laying around'. It's always neatly tucked away, or there is nothing of mine around (or I don't care about leaving it behind).
You know, in writing this, it all seems crazy but it's saved my neck a few times. I recall one occasion where I was out with an older lady from work (I was young at the time and thought I was cool). We were out having a few drinks, and I was pretty well into them (enough to where my judgement was severely impaired). In saying that, I'm usually pretty intuitive, so I stopped drinking at that point, BUT, that didn't stop me from making the dumb decision to get into a vehicle with her. I should have assessed the situation better and realized how intoxicated she was, but did not. Thankfully we made it to our destination safely (on the way I started realizing how drunk so was, and suddenly it was like my hypervigilence went into supermode and my focus heightened. I vaguely remember helping her steer. Anyways, we arrived at her friends house, or a guy's house who was a friend of her friends? I can't remember. BUT, this was where these older men offered us drinks. My co-worker accepted, and agreed they should get one for me as well. I was polite, but silent. We sat in the living room chatting, when I noticed them taking a very long time to pour two simple drinks - hypervigilence radar on extreme alert now. One of the other ladies noticed this too, and shouted to them. Soon after they came in and my co-worker casually drank hers, while I faked a sip. I never drank mine. A short while later I basically had to carry my co-worker out of this man's home. I think at that point we got a ride or cabbed it to her house. I helped her to her room where she passed out for the night. After a few hours, which carried all the way into the following day, she had to stay in bed because she could not move a single muscle in her body. I remember her telling me she figured they must've tried to drug us - successfully with her.
It wasn't until my car accident where I started getting startled and distressed too. For the most part, I'm simply very, very, very watchful and constantly prepared. If there's ever a crisis situation that goes down (such as a zombie apocalypse or some form of danger) stay with me if you want live.