Goal:
To communicate with somebody in a language you don't understand,
Answer:
learn the first one hundred most common words.

Goal:
how to ensure your seam allowances are the right size?
Answer:
use a sewing gauge

Goal:
How to prepare sheet metal for drilling into
Answer:
Clamp the steel to your work surface if it's lightweight

Goal:
To give control over how bright a light is.
Answer:
Install a dimmer switch to the light.