Strengthen screw holes using a twist-tie.

Remove the loose screw, bend a twist-tie in half, and stick the bend corner into the hole. Cut it off with scissors, leaving a hole's-width sticking out. Bend the two protruding ends opposite one another, flush to the surface. Screw the screw in again — the thickness of the twist-tie will help keep the screw from pulling out.

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Before putting your hands on bare wires, short them out first.

When you work on any in-wall electric circuits, shut off the power at the breaker. When you're absolutely sure the power is off, short out the wires using a screwdriver. If you have done everything correctly, nothing will happen; otherwise, a shower of sparks will indicate your error rather than you being electrocuted.

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When working on an appliance, put the plug in your pocket.

Make a habit of putting the plug of any appliance you're working on into your pocket. That way, you'll be less likely to accidentally work on it when it's plugged in.

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Wipe toilet seats with a small amount of toilet paper.

If you need to use any "unfamiliar" toilet (public or just at a someone's house) make a habit of grabbing a couple sheets of toilet paper first and wiping down the seat. That way you'll never sit on a wet seat and you'll know in advance that there is toilet paper.

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Use used coffee grounds to wash grease from your hands.

Wash your hands with a mixture of a small pinch of used coffee grounds with ordinary dish soap to remove grease.

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