What are the two golden rules when fighting a fire?

Make sure that you remove the source of oxygen, and other components like that in which it will make the fire spread. For example, with a wildfire if you're not able to remove the oxygen, it will continue to burn. The oxygen in fires such as wildfires are primarily biomass, which are various materials such as branches, logs, plant life etc. Another golden rule, is if you're unsure as to whether you're able to contain the fire, you will need to call for emergency help, with the fact that if you try and get it under control, it might backfire.