Quite often I use what I'm carrying in my hand - unfortunately this has led, on at least one occasion, to a spot of redecorating when the switch was a bit stiff and the object I was holding was a rather full cup of tea!
Jen, I like your style! lol
Happens to me every night, as I carry mobile phone, bottle of water and book into the bedroom. I usually use my left elbow, with a bit of body twisting.