Hi,
This is a non-technical but very handy tip that I stumbled upon by chance. You all must have trashed some appliance like a toaster, microwave, fridge, washer etc at some point. We disposed of a few appliances earlier this year that have been sitting on the garage shelf since the onset of the pandemic. While displosing I just had a brainwave and clipped the power cables (using a cutter) of all the appliances. For one it made trashing easier since there was no trailing cord left on any of the appliances.
Few weeks later, I was flashing a Sonoff relay for home automation and the power cable from one of the appliances came in very handy as it had the right plug (with high quality insulation) and all I had to do was strip the free end of the cable and screw it to the terminals of the Sonoff relay.
HTH.