input question: How to remove water stains from leather couch?

output answer: Fill a bowl with room temperature water. Dip a soft sponge into the bowl. Dip into the bowl of room temperature water, and then ring it out to get it as dry as possible. Work from the center of the water stain out, wiping your damp sponge across the surface of the leather. Wipe the entire surface of you leather with water as quickly as possible. If you allow one area to dry before the others, you might end up with a new water stain.

input question: To get blood stains out of clothing without any cold water or soaps,

output answer: soak the clothing in coca cola to remove the blood stain.

input question: How to make the boards for your stool?

output answer:
Cut you board's down to your desired height. Take a mitre saw and create dovetails on the sides to place biscuit joints on the boards. Glue in the wooden biscuits.