Tutorial: reading and writing diaries and comments
This compilation provides links to several useful resources about writing diaries and comments.
Here's a text-and-image version of the video-based tutorial above:
DK5 How-To: Writing, Editing, Publishing a Diary
We also recommend: New Diarists: Resources for all has lots of links to various tutorials created by Kossacks, for Kossacks to help you get started. Many topics are covered.