Cavity wall insulation. Most homes built since 1920 have a gap between internal and external walls. Filling the cavity with insulating mineral wool and foam means cold air's kept out, and warm air stays in. It can save an average three-bedroom home up to £150/year. We've heard of certain cases where damp has formed after having cavity wall insulation installed, so make sure it's appropriate for your home.
In Texas' deregulated energy market, customers must pick their own electricity provider, all of which offer different rates per hour of power usage. You can shop for other power plans on the state-run website,  www.powertochoose.org, or try an alternative website, like www.texaspowerguide.com to help find the cheapest plan. Keep in mind that many retail electricity contracts carry penalties for early termination.
Fixed-rate, long-term (contract) plans provide stability in electricity rates. If market energy costs suddenly trend upward where you live, you can rest assured that you won’t have to pay more out of pocket. However, if you want to switch to a different, lower-cost plan before the end of the contract term, you’ll likely have to pay a cancellation or early termination fee.
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