Always be doing more than one thing at a time

A slightly tongue in cheek idea about never doing only one thing at a time.

If you need to focus on activity A, get something else started that you need to wait on while you focus on activity A.

If you need to do a workout, start preheating the oven.

If you need to make a phone call, get some fresh air while on the phone call.

This, of course, can be taken too far. Nonetheless, when exercised moderately, this tenet can be an Efficiency.

Rebuttal

Always be doing just one thing