I generally buy brass in lots of at least 500.
What with culls and damaged stuff, this will give me about 4 "batches" of 100 each. These live in their very own MTM box, get prepped, loaded, fireformed, and fired together, ie., I don't load any more on that batch until I have fired them all.
I keep a 3X5 card(s) in a plastic envelope with each box, detailing the history of that batch:
What prep was done;
When annealed; when FL sized;
And, of course, how many times loaded, and the dates...
With pistol stuff, I don't worry.