Clean the filter once a month. Turn off your A/C when you leave for more than an hour. It saves money. Draw the shades while you’re at work. Close off unused areas or even, if you have central A/C, close the registers in those rooms and shut the doors.
Set your Air Conditioners thermostat at 78°F-or higher when you have ceiling fans. For each degree you raise the thermostat, you will save 3%-5% on cooling costs.
If you want to make a fortune in alternative cooling, invent an air conditioner that runs on corn.