Using powertochoose has become more difficult as the providers have intentially obfusciated their reported charges. They do this by offering very low charges for minimal energy use. Unfortunately these plans typically have major increases for usage above 1000 kwhr.
To use the website you need to know your average monthly energy usage.
I use an energy broker who specializes in exactly this in the Kingwood area and he is great at shopping the best rates for me! Call him! He helps anyone and everyone for free! Ben: 713-882-8311 Or email him at firstname.lastname@example.org
Look at Bounce energy. They give you things just for paying your bill on time. So far I've gotten $225 in gift cards and bill credits not to mention movies tickets and other things. Their rates are very competitive too.
I have Penny Wise Power ... 2 story 5 bedroom house, single pane windows (lots of them!) I use gas for water heater and furnace, everything else is electric. May = $153 June= $221 July= $259 Aug = $215 Sept= $204 pennywisepower.com