Using notepad as a log/journal
If the first 4 letters of a text file are ".LOG" then when you launch that text file in
notepad, instead of opening it at the top for reading, opens it at the bottom for appending. And automatically inserts a time and date stamp.
(You may also know that F5 inserts a date/time stamp.)
Tested in 2016, in Windows 10: still works.