For the last few weeks, many of my mini-lessons have focused on Sticky Dot details. I got this lesson from Marvelous Minilessons for Teaching Beginning Writing K-3 by Lori Jamison. This is the best book!!! The book gives a ton of suggestions for lessons you can do using the six traits. I use this book ALL the time.
This mini-lesson uses a sticky dot as an incentive to add details to a topic. Once the child tells you the detail, you put the sticky dot on the back of their hand (as a reminder during writing time to add a detail).
When the child is writing they put the stick dot at the end of the sentence.