Here’s a hack with a high percentage return. If you pay your own electricity bill, chances are your use is metered and charged by the Kilowatt hour (kWh) . A Watt (W) is measure of power, or energy per second, so a Kilowatt hour is just using 1,000 Watts of power for one hour. For example, a common household incandescent light bulb uses 60W of power. If you left this light bulb on for 3 hours a day for a year, it would use 65.7 Kilowatt hours: $$Total\ Energy = Power * Time$$ $$Total\ Energy = 60 W * {3\ h \over day} * {365\ days \over year}$$ $$Total\ Energy = {65,700\ Wh \over year} = {65.7 kWh \over year}$$ Since Thomas Edison invented the incandescent bulb in 1879, however, there have been some improvements to the technology. The latest is the LED Light Emitting Diode bulb. An LED bulb can create the same amount of light Typically measured in lumens. as an old incandescent light bulb using much less power. For example, an L...
Demystifying the Math Behind Building Lasting Wealth