We've learned about the goodies we can obtain from places like Harbor Freight, but how about our office supplies. Other than the standard pens and pencils, what office supplies do you use in quilting, and how are they used? Example: binder clips for clamping layers to the pinning table; transparency pens (Vis-U-Vise) for marking stencils; magnetic/dry erase boards to sketch designs and attach fabric swatches; etc. How does the cost compare to the equivalent product at your sewing center?