Let me start out by saying I am no expert on Sav's. I am letting you know what has worked well for me.

Baby savs have blue tongues, they lose the blue as they get older. Mine is about 4 years old, just over 2-2 1/2 feet and lost the last of the blueish tint I would guess about 6 months ago or so. I use a organic dirt/ sand mixture as my substrate (80/20) as it holds burrows much better than most other substrates. Check out Daniel Bennetts book, it has alot of great info.

Rodents, dusted crickets (again when they get older, less crickets and gut load them first), occasional mealworms (not often, not really nutritious), hissing cockroaches (a BIG favorite) are what I feed mine and she is healthy as can be. Be careful though, they are prone to obesity, especially if left in a small enclosure with no room to move around. Mine is very active, which in Savs is a good sign. They do need a good bit of space, don't expect to keep it in a 55 gallon, they really need a custom enclosure as they get fairly large and need to thermoregulate. Also, they like to use their water area as a restroom, so try for something large enough for them to fit into. As far as temps, don't let the cool area drop below 75* and they need a basking area around 110*, overall temp should be between 85-95*. Hides are very much appreciated and will be used quite a bit.
Savs don't shed in one peice, I do try to keep my enclosure somewhere around 35% humidity wise to help with shedding. To do that, I add water to the soil every few days. You don't want it soaking wet, but too dry for too long is not good either. Mine seems to enjoy the occasional swim in the tub or kiddie pool outside too.
Thats what I can think of off hand. Hope some of it helps