I put everything on a calendar. I color code my breeding's with different color highlighters. When I band the birds I use corresponding color spiral plastic leg bands.
First I mark the eggs with a surgical marker, pencil, even sharpie, put the eggs in the incubator and I use my styrofoam incubators as hatchers so I can separate my hatches. After the chicks hatch they go into drying brooders then after they dry they go into their regular brooder. After they go into a chick coop that is divided to keep the birds sorted. Next after a period in the chick coop they will go into grow-out coops (where they will be banded) which will eventually be used as breeding coops. I have to do it this way because I hatch out a few hundred chicks each season. I grow them out, keep some as future breeders and sell the rest. I do show birds at poultry shows and keep my different breeds pure. I did do several project breeding's in the past. Now I'm just concentrating on my pure breeds. I still do the colors to keep track of my hatches.