This lesson was taught by Brenda Swenson. She’s a wonderful watercolorist and a well-known teacher. She does workshops to Italy!! I want to go to there. Her lesson included continual line drawings. Do not lift your pen! Watch the subject and draw what you see.
If you are ever at a loss for something interesting to draw, go sit on the floor of your garage. If there is space for your butt, you will find something draw-worthy. If not, I bet that big ass mess would be more fun to draw than pick up.