I work in childcare, and discovered that an attendence sheet was the best way to go for records of laying because it already has a space for name/breed, all days listed with a box for each day and each bird for the month, and space in the bottom to total it up. My hens lay a variety of eggs, but I have only about 7 old enough to lay, and I am very familiar with their personal eggs, i.e. the color, size, shape.
My RIR lays "bullet" eggs that are almost a cherry colored brown and skinny
My BR lays a GINORMOUS light brown egg
My Andalusian lays a large white egg
My Dominique lays a medium brown with speckles
My White Bantam Cochin lays a tiny cream colored egg
My Blue Bantam Cochin lays a medium pointy at both ends creamy egg
My silkie lays a small rounded creamy egg
At the moment though, my silkie is broody with chicks, my white cochin is molting, my RIR is just not laying (mini molt?), my Dom is not laying (mini molt?), my BR isn't laying (same thing?) so the only eggs I MAY get daily are the blue cochin and andalusian...