Goal:
Make a homemade sword.
Answer:
Use an electric grinder to file the edge of a piece of scrap sheet metal to a pointed blade. Use adhesive tape to attach the blade to a piece of wood for a handle.

Goal:
Remove cigarette smoke from room.
Answer:
Spin a wet towel around.

Goal:
How to make plants look prettier?
Answer:
One could prune the plants.

Goal:
My iPhone earbuds aren't working right.
Answer:
Using a q-tip, clean the lint from the iPhone's audio port.