Summarize the following:
Heat can ignite gasoline, so take special care to keep it in moderate, cool temperatures at all times. Do not store a gas can in sunlight, or near a heater, stove, or any direct heat source. Ideally, a gas can should be stored outside of your home and somewhere cool and dry like a garage or tool shed. Whether you are filling gas into a car, lawnmower, generator, or other machine, you should be careful and precise. Remove the gas cap of the machine you are refilling and set it aside. Then open the vent first on your gas can to relieve any pressure inside. This is done to prevent gasoline from travelling up the spout and spraying all over the place. This can happen when opening the gas can while the spout is submerged in the gas. Insert the nozzle into the gas tank and pour very slowly to avoid an overflow. Be sure to close both the cap and nozzle tightly when you are done. Gas cans should be stored somewhere secure and locked, if possible. Gasoline can be very dangerous if inhaled or ingested by children or animals. Kids and pets may also cause a spill or accident that could result in the gasoline igniting. Avoid storing gasoline for longer than a few months. Over time, gasoline can expand or wear down the gas can, increasing the risk of an accident. Purchase only as much as you need immediately, or a small amount more, to avoid having  leftover gasoline in storage.

Summary:
Keep your gas can somewhere cool, preferably outside of your home. Move slowly and carefully when filling up a machine. Keep kids and pets away from gas cans. Use gasoline in the same season that you buy it.