I use one file as my org-mode daily driver. This file is called journal.org. It starts with a datetree, which is where I capture general notes, individual tasks, ideas, things to read, etc. etc. I have separate headings for other content, for example all of my projects are under a projects heading, further split by context. Roughly the file looks like this:
* 2021
** 2021-03 March
*** 2021-03-15 Monday
**** [2021-03-15 Mon 16:29] note title :tagA:tagB:
- note content here ooooo