I’m as guilty of goofing off rather than writing as the next person, but I find that doing the more mundane tasks like laundry or dishes helps me to mentally revise or create scenes. I’m also fond of using a notebook and pen to get scenes initially roughed out. If a scene idea pops into my head for later in the story, I write it out in the book. No blinking, impatient cursor on the screen to worry about. It’s getting from where I am in the story to those scenes that seem to take the longest for me. “Luckily”, I have lots of laundry and lots of dishes to do ;)

As for how to break through a block, I’ve found that those blocks tend to come because something in the scene’s not working. Usually whatever I wrote most recently. Once I rip that out, I’m off and running again.

Good luck!