Holy Crap - I just discovered that one of my tenants or one of their druggie friends turned on the pool heater three weeks ago. That's gonna be 11000 watts per hour for twenty one days, and or, 5544 Kilowatt Hours. So you know, that's enough juice to run one 100 watt lightbulb for 69.616 years. I better find an oil well on the lot.
Living in or worrying about the past, or about something once done that you could have done better is a useless endeavor - for no amount of energy can change the past. The future is still to unfold and may never be, and so waiting today in anticipation of something tomorrow is just as fruitless as is your lamenting the past. Our only time to truly live is in the present - this moment - and to do all that is doable.