My daily planning calendar has to have 2 pages per day. For tax purposes and to alleviate ADD (ugh), I need to have one page that is a sort of journal, keeping track of where I spend my time and notes from the day. My daily planning calendar has:

Schedule from 8am to 11pm

Waiting For Followups (where I schedule a follow up when I write something down in the “waiting for section”)

Expenses (where I jot down any expenses for work for the day – great for tax audits)

Task List (where I have written down anything I needed to schedule to do that day)