I don't think that I did anything special to get them to breed. I live in So. Cal so I keep them in my reptile room at room temps year round, so they get only a mild seasonal temp change. I have had them together in the same set up for a little over three years, and I tend to leave them alone except for feeding and cleaning. I keep them on ecoearth with lots of hides and fake plants so they feel secure and I make sure that the substrate is very moist year round. They will drink standing water so I always have a dish in there for them. I give them live pinkie mice every once in a while when I have extra, sometimes they eat them and sometimes they don't. Thats about it, this is the first year I got eggs from them, and I got three from the one female and none from the other.
As for incubation, I incubated the eggs in a hovabator at 77F in moist vermiculite, pretty much the same as a crested gecko except that it took like 5 months.
Thanks