I second the papertowels as substrate - not only is there no worry about eating some (to tell the truth, our little girl ate some paper towel when she was only a few months because both her and the cricket wouldn't let go! All came out in the "end" just fine.) Also papertowels are much easier to monitor for mold growth.

I've used several iterations of enclosures as she's grown, but I think the investment in an exoterra glass one was really worth it. We mist only once a day, so she has a dry and wet cycle and she's never had shed or dehydration problems and letting the papertowels dry out limits mold and other nasties growth.

Crested Gecko Diet all the way. When they are young they will grow faster if you supplement with dusted insects every 3 feedings or so. (I like crickets.) After the crestie is full grown, we still like to give crickets once or twice a month for psychological stimulation.

No need for light or heat as long as you keep the enclosure in the 70s. Below 65F is deadly and above 85F as well - however I've seen cresties show signs of extreme heat stress as early as 80F, so I always err on the side of cooler. If you have another herp, it is nice to put them next to each other. Our current setup is one leo next to one crestie - the crestie is close enough to the leo's light to get an idea of a day/night cycle, but it doesn't really raise the temperature of her enclosure.

The only other thing I would add is my fiance's favorite line, "If you can find your crestie all the time, you need more leaves." I also tore apart a plastic thing from IKEA to make a ladder & horizontal surface as it is important to have horizontal resting places above "ground" to prevent the possibility of hip problems. Hope this ramble helps!