Geek Your Rate: This website finds you the lowest-priced electric provider and plan in your area based on your last 12 months of usage (You have to type it in from your bills). You pay a one-time fee of $9.95 to access the rates and the website's algorithms to find your best plan for a 48-hour time period. You can also try it for free to see how it works, but the data Geek Your Rate gives in the free trial are 6 months old. More info
The more cool air you lose, the harder your air conditioning unit works and the higher your electricity bill will be. Install blinds, hang curtains or get storm windows made to keep cool air from seeping out. Even mesh screens, on the outside of your home, will help deflect solar radiation. You might even consider replacing old windows that leak cold air and let in heat.
On the one hand, long-term, fixed-rate (contract) plans offer stability in pricing. If energy supply costs suddenly go up in your area, you won’t be left paying more than what you bargained for. You’ll have peace-of-mind. If you want to switch out of your contract before it ends with a lower cost plan, you’ll likely face a cancellation fee (early termination fee).