Copying an old comment: "The New Drawing on the Right Side of the Brain: A Course in Enhancing Creativity and Artistic Confidence" by Betty Edwars.
She taught drawing classes and discovered that one reason why people is bad at drawing is that they symbolize what they see before drawing it. For example, when we see a face, we tend to focus on the eyes and mouth and ignore other features like the front. That contributes to a distorted representation that is reflected in the drawing.
She devised a series of exercises to avoid that problem. For example, try to draw a picture upside down, or try to draw an object shape using negative space (you focus on the shapes outside the object).
seconding this; a few years ago, I took a week-long course based on it, which worked way better than I expected. Before, I was at level of 5-yr old drawing stick figures; on the final day, I drew a portrait which looked like something you can get from a street artist.
She taught drawing classes and discovered that one reason why people is bad at drawing is that they symbolize what they see before drawing it. For example, when we see a face, we tend to focus on the eyes and mouth and ignore other features like the front. That contributes to a distorted representation that is reflected in the drawing.
She devised a series of exercises to avoid that problem. For example, try to draw a picture upside down, or try to draw an object shape using negative space (you focus on the shapes outside the object).