Morphine paired up with nanobots make a great emergency recovery set, either variant of that Rivtech shotgun that fires 20x66mm rounds, a M72 LAW, which I have unpacked and stored in my bike, because the biggest chance I’ll find a walker or drone is when I’m driving around.
I also carry a variety of explosives of varying function and explosiveness if I can.
Annnd I have my sledgehammer, on the off chance I find myself cornered but not vaporized, I can break a hole in the wall to make a escape.
Though more often then not I can never use any of my tricks except the first one mentioned.
EDIT I also have a ammo-less rifle with a loaded grenade launcher in my trunk.
ANOTHER EDIT add a adrenaline injector to the growing list.