Learning Line Art

I've been trying to explore using line art in my pieces. I think it's the fastest way to convey design, shape and form. So I think it would be beneficial if I were to brush up on my line art. It's different drawing in digital than you would sketching on a pad of paper. There's all the nuances in stroke, weight and texture that you just don't get from Photoshop. It takes a bit of finessing to get line art to look good in digital.