Goal:
Filter water using a charcoal filter.
Answer:
Instead of coffee grounds, use activated charcoal. Rinse the charcoal well before placing the charcoal in a coffee filter. Place the coffee filter into the coffee maker and proceed as if making coffee, instead it will be clean water.

Goal:
credit card
Answer:
can measure gaps between rafters

Goal:
How to make a custom mannequin for yourself cheaply.
Answer:
Cover your body with duct tape, sticky side up and then add another layer sticky side down, then fill it with expanding foam and you have your mannequin.

Goal:
How to pierce your own ears.
Answer:
Clean the area to be pierced with alcohol. Make a mark where you want to pierce. Pick your piercing earrings. Get a sterile piercing needle place over open flame. Place a wine cork on the back of your ear. Place the needle on your mark, take a deep breath, and stick the needle through your ear. Put piercing earring in your ear.