Strongly recommended · for beginners
A simple guide to electronic components.
Why people recommend it
Big Clive's run through the common electronic components and what each does, suggested as a first stop before kits or Arduino projects.
Watch for: Absolute beginners; move on to EEVblog afterwards for depth
In their words
I recently watched a video, where the guy explaining resistors, drew a sketch showing 12 V → resistor → LED --- 0 V (Do you choose your resistor to the extent of "using up all the current/voltage" before it gets to the end of the circuit?
Louis van Tonder on electronics.stackexchange.com, Feb 2018. CC BY-SA.