Sign up with Entergys rewards club. (Must be a customer, must have your account number.)

1500 points for signing up. (This is the YMMV part.)

Now go to Earn more points:

200 points - Complete home profile

150 points - Share your pledge on face book

150 points - View your home energy report.

= 2000 points!



https://www.entergysolutionsrewards.com/

Each 1000 points supposedly gets you a $10 gift card from Amazon, sent to your email immediately (be sure to check your spam folder if you dont see it). Here are the gift cards they have:
Amazon
Barnes & Noble
Chili's

Foot Locker
GameStop
Gander Mountain
golfsmith
Groupon
iTunes
Maggiano's
Marriott
Old Navy