This has a ton of really great and quick activities to help with students' handwriting. I really like the b/d makes a "bed" and using index fingers to help with spacing between words.
This article shares a strategy that teachers in a preschool, kindergarten or first grade classroom can use. The strategy involves the use of the children's drawing and writing a message on the drawing. There are components such as self-talk and materials like highlighters used to draw lines to create ideas.