I've found a set of materials that I really like working drawing with. I thought I'd take a moment to share. The drawing below was done on Strathmore (400) paper with a .01 Sepia colored Micron pen over a light 4h pencil sketch and a little wash of watered down Walnut ink.
The Strathmore paper has been, for a long time, my favorite all purpose sketchbook material. I buy pads of various sized and try to carry one with me wherever I go. They aren't as "cool" as the moleskin sketchbooks that are so popular, but it's good paper.
4H pencils have very hard lead and leave a very light line. Perfect for underdrawings. Because of the hard lead they last FOREVER.
Micron pens have long been popular with illustrators and comics people. The .01 sepia pen is a good compromise if you want to have a sort of "old masters" look to your drawing, but don't want to carry a dip pen and bottle in your bag.
Walnut ink, also recommended by JR Howley is good ink with a great color. It works well as a was, or as a drawing ink.