OK, here's a few:

Inline citations - you can delete the fields you don't need and compress the template fields onto one or two lines, rather than a dozen.

In preferences, set it so you get a reminder to leave an edit summary - important for other users.

Next to the save page button, there is a preview button. You can use this to see what your edit looks like before you save it. 

It might be an idea to prepare articles in a user subpage, or even off-wiki, so you don't have to hit the edit button quite so quickly.

But generally, things are shaping up. If I get time to look in more detail, I will.