Kevin: I've had my wild-caught tiger for 3+ years now. He's in a 10-gallon aquarium, with a mixture of Jungle Mix and soil from the place where I found him (under one of my horse water tubs!) I keep a water dish in too. A single-serve frozen lasagna dish fits very nicely.
I feed him crickets, meal worms and earthworms. I try to vary the diet so he doesn't get too much or too little of something. I keep the soil moist. We have well water so I don't worry too much about additives. I think city water might be different.
Sometimes in spring or early summer, if we are lucky enough to get rain in the Texas Panhandle, I find little white grubs, roly-polys, or small worms when digging in the garden. Since I don't use any fertilizer except horse manure, and this is the area he came from, I feel comfortable feeding him those, too. Once I found a nest of newborn mice in my grain bin. He sure liked those little pinkies!
At first I would just put the food down in front of him and watch from a distance to make sure he ate. But in no time, he got to where he would see me coming and go nuts begging for food. Now I just have to be careful he doesn't grab my finger because that sucker can hang on.
I usually feed him every two or three days, and he is plenty hefty. I was away for two weeks (just got back yesterday)and no one to take care of him. So I fed him every day for a week in advance (he really liked that!). When I got back, he was just fine. Didn't look like he'd lost an ounce.
I hope you have as much fun with yours as I've had with mine.