My reasonable preparedness is:
-praying about everything and anything
-staying alert and "in-tune" with what is going on around me
-always doing my best to "keep the peace" and de-escalate
-walking away if it's safe to
-always having the entrances and exits visible if possible
-always having an escape plan
-always practicing and being intimately familiar with my firearms function
-and always having a firearm on me or within reach, even when I shower, whether it's my 12 gauge or my Taurus pocket .380 (that has never failed me, lol). What I carry or have within reach depends on where I am, what I am doing, what I am wearing, who is with me, the law where I am, etc.
This is not an exhaustive list, everything changes with circumstances; but these are the things always on my mind...