There is just so much paperwork that one family can take and we’re only dealing with one kid here! I can’t imagine what parents of multiple kids deal with.
Right now we have a spreadsheet in the hall outside Monkey’s door tracking his sleep habits. What time he goes to bed, what time(s) he wakes up during the night and what time he gets up for the day. We have a place for notes as well to include information like “no melatonin” or “had to be woken up”, etc.