@bnjrob already gave you outstanding advice, but I will also add my two cents here since I've basically dividing my breeding program into two primary lines, one for meat birds and one for egg birds. My setup allowed me to keep smaller individual flocks of laying birds, which also allowed me to become familiar not only with frequency of laying, but egg size, color, shape, etc. I'm one of those nerdy people who actually tracks egg laying on a spreadsheet, and it's proven exceptionally helpful to me when deciding which birds I want to breed for egg laying tendency. For example, my BR named Luna is an outstanding layer of jumbo-sized eggs. She was the first bird to start laying at 18 weeks to the day, and even during the harshest molt never dropped below four eggs per week. Her sister BR named Sky proved far more sporadic in her laying, averaging 4 large eggs per week and dropping to only 1 per week during molt. It was a no-brainer as to which one I would breed, and all of Luna's offspring have been fantastic layers that start early and lay jumbo-sized eggs.
I've also found it helpful to mix hens that lay different colored eggs in the same nesting area. I won't use trap nesting because of the heat out here, but once they're all laying in the same boxes it's really easy to discern one bird's eggs from the others based on color alone.
