WHAT IS TIME; SPACE AND MASS / MATTER?
HOM MUCH IS YOUR TIME WORTH?
You've probably heard the saying "time is money." It's a popular line for a reason — it's true.
Everyone has an implicit value for their time, though they may not think in those terms. Even a billionaire will volunteer to do an extra hour of work if he or she is offered enough money in return (say, ten million dollars). Likewise, even a desperately poor person will refuse an extra hour of work if the compensation is too small (say, a penny). The value of time can also change dramatically depending on how much of it you have available — you will likely value your free time much more highly if you're very busy than if your schedule is completely clear.
It's extremely useful to know how you value your own time. If you can figure out how much money each extra hour is worth to you, it'll help you make smarter decisions about many subjects.