How do you change a spark plug on a Honda CRV?

Answer 1

Pretty straight forward operation.
Grasp the spark plug wire by the boot, and twist it to free the boot from the plug, and then pull the wire and boot from the plug.
With a 5/8" spark plug socket (and probably an extension) turn the plug counter-clockwise until it is free from the threads in the head, and remove it from the spark plug well.
BE VERY CAREFUL not to allow anything to fall into the well, as if it goes into the cylinder, major damage to the engine will result when it is started.
Check the gap on the new plugs, and use a bit of ANTI-SEIZE compound on the threads of the plug. You can purchase it where you buy the plugs. Use the compound sparingly, but be sure that all of the threads are lubricated. The purpose is to reduce the possibility of damage to the head when the NEXT replacement is performed.
The head is aluminum and has CUT threads, while the plugs are steel and have ROLLED or FORMED threads. They don't match EXACTLY and after many times of expanding and contracting at different rates, they can seize, and removing them can cause the threads in the head to be damaged.
Secure the spark plugs well, but do not over-tighten them. They should be tight enough to crush the gasket, but not so tight as to damage the plug or the cylinder head.
Replace the plug wire, and move on to the next one. Continue until all four have been replaced.
If you are using platinum plugs, gapping is unnecessary, and will damage the coating on the electrode(s).

Good Luck