An article by Rosie on the House suggests a plan to save on electricity if you have a tiered rate plan. Supercooling. Cool your house as much as you can stand during off-prime hours and allow the temperature to rise as much as you can stand during prime hours. Another idea is to pre-cool three degrees below normal for three hours before prime. Then allow temperature to rise to three degrees above normal during prime. You get the idea.
For me, 75 degrees is the ideal daytime temperature in the summer. It looks like I’ll be able to drop the temperature to 72 with one hour of pre-cooling. I’ll let it rise to 78 during prime hours which is a bit warm but still comfortable. Then it’s back to 75 before dropping to 72 for sleep.