I like the calendar idea .. might get one for the coop ~ great ideaI am being serious. Print out a month calendar and hang it on your fridge..tally marks for ever egg you collect.
I take it one step further and code color my eggs.
I know since day one how many blue eggs, dark brown eggs, pinkish ones and born ones I have gotten. It will help in the future too, you will see when/if your numbers go down...helps keep track of their health.