The humidity in the tank should be at 70% or a bit higher. Humidity is very important to chameleons because they live in the tropics where it is always sunny and humid. Using a cheap squirtbottle you can mist your chameleons habitat at least three times a day and make sure the chameleon's eyes get misted so that they don't dry out and to clean them.
Chameleons don't drink out of bowls, instead they drink droplets of water off of leaves. To do this all you have to do is use a thumb tack to poke a hole in a paper cup, this will allow the water to tickle out slowly allowing your chameleon to drink. Another option would be to buy a dripper which is basically the same thing, the water just trickles out a bit slower.
Live plants in the enclosure help out a lot with the humidity. Some good plants are pothos and spider plants, you can find these very easily around summer time in hanging baskets. A good pothos vine will fill out an aquarium nicely for pygmy chameleons.
chameleons eat crickets as a staple food. The crickets should be fed themselves before being given to the chameleon. This is called 'gut-loading' and what it means is that you give your crickets fruits and vegetables to munch on and your chameleon will be healthier for it. You should feed adult chameleons every other day and juveniles everyday.
The temperature in your chameleon habitat should be around the mid seventies with the heat light placed over where you want your chameleon to bask. The temperature directly under the basking light should be 80 degrees and no more.
Chameleons need UVB/UVA lights in their tanks because these lights will immitate the suns rays and most reptiles need the sun to be able to properly process calcium to create vitamin D3 in their bodies to avoid Metabolic Bone Disease (MBD). MBD is the breaking of bones, sort of like Osteoporosis in a human. It is very painful and the reptiles gets 'lumps' all over his body where bones have shifted or muscles have overgrown trying to compensate for broken bones...it's not a pretty picture. MBD can be cured withexposure to proper UVB/UVA lighting.
It is wise to buy calcium powder to make sure your little guys get enough calcium. You can dust your crickets with it and they will be just fine.
chameleons breed in harems, one male to two or more females. If two males are put together they will fight to the death so it is important to know whether you have a male or female on your hands.
chameleons do just fine on their own or with their own kind, so long as two males aren't together. You can have as many females as you want together, they get along just fine.