I would not encourage children or teens to multitask because we don't know where those efforts may lead.

Have enough sense to know, ahead of time, when your skills will not extend to wallpapering.

Be able to back up a car for a considerable distance in a straight line and back out of a driveway.

Be able to read blueprints, diagrams, floorplans, and other diagrams used in the construction process.

Know how to behave at a fine restaurant, which is a telltale measure of social maturity.

Just because you're unemployed doesn't mean you're not doing anything useful. You are, for example, at least keeping your mother-in-law's wit sharp.

Know how weather, especially humidity, can affect the movement of doors and windows.