Developing Habits for 21 days

I have slept 7 hours. During last one-third of the day, I was not able to meditate. I made repeated attempts, but all of them ended up in falling sleep. 

I am editing a book. I have spent five hours or so editing the book. I have not exerted again and again like I did in the previous days, after five hours.

I shall develop the habit of doing an editing work for 9 hours, or more until the books are finished.

I have not exercised for 30 minutes, but I did exercise for 15 minutes.