Goal:
To ensure that two ends of string stay together, you can
Answer:
Tie a knot in the string using your hands. This will keep the string in place

Goal:
How to efficiently park in the garage while using as little space as possible
Answer:
With a spotter, pull the car into the garage as close to other objects as possible, and have the spotter tell you when to stop. Hang a tennis ball from the ceiling to touch the windshield of the newly parked car. In the future, pull the car in until the windshield hits the tennis ball.

Goal:
Add shine to cooper cooking tools.
Answer:
Scrub with a slice of lemon sprinkled with salt.

Goal:
To find an air leak on a car's tire,
Answer:
rub the outside of the tire in soap and water, and look for where bubbles start to produce.