Stick with whole foods. Rodents,insects, whole fish, whole chicks. No pieces of this,hearts of that.

The savannah site posted is a good one. I don't agree with the don't feed Savs rodents, but thats another debate.

Pro-Exotics has some great info on there site. http://proexotics.com/care_sheets.html

www.varauns.net. And
www.varanus.nl
Are full of tons and tons of great info, however neither is newb friendly IMO
The info is there though.

Good Luck