First step – do LOTS of reading
Second step – make sure you have both a male and female, unrelated, and that they are both healthy and old enough
Third step – reconsider (it’s a heck of a lot of work to do it right!) Breeding will produce many baby reptiles. ONLY if you are sure that you have time, knowledge, and patience, are ready to spend a lot of money, and have homes to give the youngsters to, only then you should consider this venture. You can be sure you will NOT make money in the end, so be doing it for love, not financial gain.
Fourth step – Get an appropriate egg laying container. You will know what this entails because by now you have done copious amounts of reading.
Five – feed them correctly. Adult female veiled chameleons should not be fed all they want, their diet should be restricted. Calcium should be provided frequently, D3 supplementation should be provided occasionally. It is also important to provide vitamin supplementation, or, even better, gut load the feeder insects before they are fed to the chameleon. What you are trying to achieve is variety (of both feeder insects and gut-load) to avoid dietary excesses or deficiencies.
Six – is she ready? Most female veileds advertise their sexual maturity by displaying gravid colours (you’ll know what this means after all that reading) on their sides and casque. Not all females will display this however. Another method to judge a female's receptiveness to breeding is to show the female to the male, or visa versa. If the female turns dark, gapes widely, hisses, and /or rocks back and forth, upon seeing a male, she is not ready for mating.
Seven - When the female has been inseminated, she will conveniently let you know by altering her coloration.
Eight – She lays, because you’ve provided the right medium/conditions
Nine – care for her, she’s exhausted!
Ten - remove the eggs to a separate, more manageable container. Care for them. Have appropriate sized cages and insects ready at the appropriate time.