There is a simple feature in Notepad that can make it work like a personal diary for you.
Here is how to go about it:

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.

This way you can keep track of all your entries,you can easily monitor which article you wrote when.This can work very much like a personal diary.Try it out and let me know how you find it?