

A quality hand truck and a couple furniture dollies come in handy much more often than you might think.
If you’re the DIY type, make sure you buy a non-contact voltage tester pen (‘beepstick’). It beeps when it is in proximity to electricity.
Edit: see the mic_check_one_two comment below. Apparently I’m lucky to not be a crispy critter.
I usually test with a multimeter after carefully exposing the endpoint or whatever I’m working on. I had no idea that NCVTs were that untrustworthy, thanks.