Its been a long time since I issued a "challenge" to my readers (shoot, I have been gone for so long, I don't really have many "readers" anymore!!).
Regardless, here is a challenge. Write for five minutes, ten times in a day. That's it! You will need to start early enough that you can get to ten separate writing sessions. You have to do "something" else after each session, before you restart, for it to be a discrete session.