Kaiju never rot. During World War II one of the U.S. amphibious landings failed due to a dinosaur attacking the troops. Aliens hate helicopters. Important people are forced to ride in the back of tactical military trucks. When traveling back in time to 1944, do not choose a landing point under naval bombardment.
Japan has a secret nuclear submarine armed with ballistic missiles.
Androids are immune to the laws of inertia. Never kick a robot unless you have on steel toe boots. Godzilla is full of soap suds. Always wear your seat belt, even when piloting a cybernetic monster capable of leveling cities. If you are forced to carry Godzilla anywhere make sure that the dangerous side is facing out.