I think you mean Daily Note, right? For me I keep track of 3 things, which each get a heading.
Meetings - scheduled meetings on my calendar, always take notes during or after the meeting
Communications - phone calls mostly, but can also be ad hoc in person conversations, I will summarize the call in a sentence or two, if it is relating to a project, include a link to the project note
Journal - In this section I write down progress on significant projects or tasks
At the end of the week, I review these daily notes and they always remind me of tasks I need to take care of in the following week. Also when I work on a project, I will look at the backlinks that will have a list of the days that I worked on this project because of the links in the 3 sections above.