How to hook up a Raspberry Pi?

Here’s the quickest, no-nonsense way to get a Raspberry Pi (any model, esp. Pi 4/5) up and running. Pick With a monitor or Headless (no monitor). What you need Raspberry Pi (Pi 4: micro-HDMI ×2, USB-C power; Pi 5: full-size HDMI ×2, USB-C PD) micr...