There is a simple feature in Notepad that can make it work like a personal diary for you.

1.Firstly open a blank Notepad file.
2. Now write .LOG as the first line in the file, then press enter.
Now save the file and close it.
3.Open the notepad file now and you will find that the current date and time has been appended(put) at the end and the cursor is in the next line.

4. Type your notes and then save and close the file.

5. Each time you open the file, Notepad repeats the process,that is it appends the date and time to the end of the file and places the cursor below it.