TASK DEFINITION: In this task the focus is on physical knowledge about the world. Given the provided goal task in the input, describe a process that would lead to the asked outcome. This process often involves physical motions with objects, such as moving them, arranging them in a certain way, mixing them, shaking them, etc. 
PROBLEM: How can I save my milk if I am going to be leaving town for a bit?

SOLUTION: Freeze the milk, but make sure the jug is not more than 3/4 full at most. Then just let the milk thaw when you get back.

PROBLEM: How do you vacuum detritus off the surface of the sandbed in an aquarium?

SOLUTION: The easiest way to clean detritus from the sand in an aquarium is to use a long, flexible piece of plastic tubing. Start a syphon, and use the tubing to vacuum the bottom, syphoning the dirty water and detritus into a bucket to be disposed of.

PROBLEM: To keep hands free while travelling in public, without compromising your style,

SOLUTION:
use a small backpack instead of a bag.