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Household Hacker makes videos with all sorts of interesting tips and life hacks. A while back they did a survival edition with 7 survival hacks.
There are some really cool ideas in this video including: how to get more light from a candle, how to filter dirt out of water, how to get a fire going faster, how to keep mosquitoes away, how to make a solar microwave, how to find north with a needle, and how to make an oil lamp with a soda can.
You can watch the full video below.