There are a tremendous number of resources available to help you with holiday decorating ideas. Below are a few of the ones we used to produce our lighting display.
Computerized hardware and software products
http://www.lightorama.com/
http://www.superstarlights.com/
Helpful design forums
http://forums.lightorama.com/
http://doityourselfchristmas.com/
http://altoonalights.com/mega/mega_calc.php
Product Suppliers
http://www.holiday-light-express.com/
http://holidaylightinginc.com
http://magicchristmasnews.org
http://christmaslightshow.com
Light Displays in the Carolinas
http://www.christmascarolina.com/forums/content/section/147-member-map.html