It really is easy to breed and raise crickets as feeders for your chameleon. Crickets will lay their eggs in the moist dirt. Female Crickets have the middle 'tail' which deposits the eggs. (Males only have 2 'tails')
Click on image below for easy method of breeding crickets.
This video shows how one man breeds crickets but it may appear more complicated than it really is. The image above from Wiki-How will also show you, in easier version, how to raise and breed crickets.
The pictures below show my simple setup for the newborn crickets. They are outdoors in the warm summer. There is fresh food, dry cricket food, and tiny crickets in the picture, with cut up egg crates. The newborn crickets had been transferred from the laying soil bin (not shown).