ALWAYS put in names under the author field. Often when people print to the elog, they forget to edit the entry to put their names in rather than printmeta.
Explain what you are doing rather than post a series of pictures without any comments. If you change a setting, note that you changed it rather than just show the result without explaining what you did to achieve it.
You can edit entries but be careful when you do so not to remove actual content. If you write something that you later think wasn't true, don't delete it. That is not good science. You can edit the entry to include an additional comment.