Proper knot tying.
A ‘’Square Knot’’ (aka ‘’Reef Knot’’) – taught to **millions** of Boy Scouts – is NOT ( I repeat – NOT) to be trusted with your life. Even if tied properly, it can ‘turn’ and slide or release under un0balanced tension. If improperly tied (a ‘’Granny Knot’’) it is even worse.

Far, far better – A ‘’Figure 8 Bend’’ (aka ‘’Flemish Bend’’). Far superior – can be checked visually very quickly, locks onto itself, and for most cordage, quite reliable.

Alternately, A ‘’Double Fisherman’s Bend’’. Easily tied, quickly checked,

If a power line falls next to you, do not walk or run. Put your feet together and do bunny hops.
When the water line is unusually far from the shore, it is a sign of a tsunami.
If sunlight shines through a clear water bottle, it may cause a fire.
Baking soda can put out fires, even grease fires and electrical fires.
Never work under a car on a jack, always keep it on jack stands or a lift.
When you fall, first cover the painful area and try to move your body slowly, do not force yourself to stand up.
If you suddenly cramp while swimming, take a deep breath, straighten the knee of the cramped leg, pull the sole of the foot up, and swim to the shore after the cramp is relieved.
If your body is on fire, do not run around, roll on the ground immediately to suppress the flames, or cover the flames with clothing to effectively put out the fire and ensure your own safety.