Is there a term in English for where you want to describe the discreet or cautious approach you take, when you want to make sure you're not risking or jeopardizing anything in doing a routine job?

How would a native complete these sentences?

>The _______ is to take two more spare tyres with you when you go off-road.

OR

>You have to bring a sleeping bag, in case it gets cold in the forest over night; that is called _______, my friend :)