Yeah, measuring that idle draw is a real buzzkill for your blissful ignorance. After hearing @susan130's printer saga, I started side-eyeing every blinking light in my house. Now I'm just one step away from unplugging the clocks.
Man, I did the exact same thing with a plug-in energy meter last year and it was genuinely shocking. The biggest culprit for me was this old desktop printer I never used but kept plugged in, it was just hemorrhaging power. Getting a smart strip with individual outlet control was the game-changer, lets me schedule everything to truly shut down overnight. Turns out my cable modem and router were also bigger drains than I assumed, so those are on the timer now too. The mental relief of knowing nothing is secretly sipping power is almost as good as the dip in the utility bill.