Best exercises to improve line quality and design

[Jeso]

On line quality, you can practice like.. with charcoal mostly cause its such an awesome expressive drawing medium, try to draw things from life, and contour lines and shapes draw really sharp lines.. and make sure to use soft lines where the form turns and such.

It sounds really simple, but it often time slips peoples minds, and when you actually focus on it, you end up with a pretty good line quality work.