I have to post the pictures of Sarah's diaries here to remind me about my own strategy.
Instead of having her writing her diary everyday, I asked her to write every other day but with more detail on some thing that happens on that specific day. To give her enough time to finish a completed article, she is also allowed not to have to do her writing and reading workbook on the days when she's writing her diary. We started with adding weather. My plan is to let her include some sentences on weather for couple weeks then include the second topic on her thought. By the end of this year, Sarah should be able to write the meaningful couple pages long diaries.
NO RUSH, LET HER TAKE HER TIME. - I will remind me this time to time.