If you’ve never tried blind contour drawing then I encourage you to give it a go. The contour part means that you draw in one continuous line without taking your pencil off the page. The blind part means that you only look at what you’re drawing, never at the page. This can be a challenge to start with and you might find yourself glancing down without thinking so it can be good to cover the drawing or do it under the table so you can’t “cheat”. These drawings don’t take very long and even though you never end up with anything brilliant they are good to warm up and often produce a much more confident line than you might normally achieve. It makes you really look at and see the subject rather than obsessing over your drawing which is a good skill to practice.