What can I do to prevent breaking a spark plug before I remove it?

This is not an inherent problem associated with the Corolla.

That is not a real answer. You could post a statement to go to a mechanic for any question. I am obviously looking for a mechanical answer.

Remove engine cover and lay aside - Next remove ignition coils fasteners- coil wiring harness fasteners and lay wire harness aside - Next remove ignition coils and spark plugs one at a time - then reverse procedure to complete the installation. Noting the following: spark plug torque is 12.5 ft lbs. ... (Ambient temperature is irrelevant)

Would you recommend using SeaFoam or carburetor cleaner to get rid of possible carbon prior to removal to prevent breakage? I do not know who worked on auto previously to know if anti-seize was properly applied to threads when installed.