The future is yours:
http://www.bing.com/shopping/basic-programmable-thermostat-rth221b1000/p/CD64CEB5142F129258BF?q=programmable+thermostat&lpq=programmable%20thermostat&FORM=HURE
For $18.97 you can install a programmable thermostat. You can come home to a cool house without paying to cool it all day.
Check my response at #49.