I have the same problem Tiffany...and to make it worse what eyebrow hair I do have are almost totally blonde so you can barely see the ones that are there.
As Kate said shaving will not have any effect on growth or thickness (just another old wives tale).
I tried pencils and shadows alone but found it very difficult to shape them so they looked natural and symetrical. I did some research and found a stencil kit that has small plastic stencils in several sizes and shapes that you can put over your eyebrow and simply dust it with color (I actually use a light brown eye shadow) to make the perfect shape. It takes a little practice to learn how to get them both exactly right but the instructions that came with mine were easy to understand and follow. You can probably find the stencils in the beauty section of some stores (not sure I bought mine via the net).
I would post the link but I think it would be in violation of the rules so if you want to PM me I can give it to you.