<b>These are the kind of simple projects for the laziest and most inept of crafters.</b> Even if you can barely operate a drill, you can do most of these projects — and in less than an hour.
perspectiva conica - Buscar con Google
fun ways to draw trees -- drawing lesson
Pen and Ink drawing, tree trunk
Get started with ink drawing - tone and texture
Durer pen drawing of pillows detail. Great website explaining cross hatching technique
arthur guptill - Google Search
Pen and ink techniques for creating value.
Varied weight and hatching techniques to create weight and texture
The Urban Sketcher: Techniques for Seeing and Drawing on Location by Marc Taro Holmes