When I respond, I grab my stethoscope (usually kept by the kitchen door or in my car) which I have attached a watch to. I take my cell-phone, wallet, and epi-pen out of my purse and put them in my pockets (I don't take my purse on calls). I keep a couple pairs of gloves and a pen in the arm-rest of my car, along with a small notebook. Everything else I could want is on the ambulance. I keep my radio on me when I'm able to respond.
In my jacket pockets there is usually a couple packs of chewing gum, both regular and caffeinated.
If by chance the call is close enough to my house where I could walk to scene faster than I could drive to the firehouse, I have a department issued jump kit that I will take and radio in that I'm going direct on foot. Otherwise, the jump kit stays home.