This video shows you how to create simple 3D wireframe models in AutoCAD. Review Tutorial 3-5 for more information.
The regular concepts of drawing accurately that you learned at the very beginning still apply here and you actually have to be more careful than ever.
You might not use wireframe models much in your drafting career, but it is a very useful skill to have. Learning these techniques is also great practice before moving into more complex 3D modelling.