Take an old stick you have no use for anymore like an old broom or a mop and go outside. Lean it against the ground and use a lever with your legs and body and bend it a little this way and that way. Work slowly till you find the easiest breaking point and break it using the least amount of effort. It is important to know how much and how sticks break and to know how to use them after they break. The important thing is to keep your focus on your survival and not the condition of the tools at hand. This goes for the partners you are working with. You are working with people with tools and not against the tools.