Sewing
Here are a few links showing how to make HM Bias Tape...
http://www.fiber-images.com/Free_Things/How_Tos/how-to_make_bias_tape.htm
http://sew-info.com/OLRG/
You can also buy Bias Tape Makers...
http://www.threadart.com/Q/tape_maker.asp
http://www.ericas.com/quilting/tools/biasmakers.htm