I always hated measurement in math classes. I can't do it. And it drives me crazy. So, when I discovered the steps to making your own bias tape - an realized how much money I can save doing it - I realized that I had to find a way around my problem with measurement. Then I discovered the Singer Bias Cutting Gauge.
I read about this gauge in Charlene Philips The Sewing Machine Attachment Handbook. And I couldn't figure out how it worked - sometimes I am quite dense. I wondered if it somehow marked the fabric so that you ended up with a line exactly 1/2 inch from where you cut. It is simpler that that. Basically you affix it to the blade of your scissors and it works as a guide to keep you measurement straight. The guide skims the cut edge and lets you cut exactly 1/2" (or the desired amount). Its right there on your scissors so with even minimal attention you will get evenly cut bias strips easily.
I discovered it on Ebay and bid a few times and lost out. (Those buyers who come in the last 5 seconds always seem to spell disaster for me!) Finally I secured one and it was on its way.
Right now I only need short strips of bias tape because I am trying to make nicer seams inside my sewn garments. I really Hong Kong seams but for now, I am just finishing them sewing bound seams. But now that bias tape is so much simpler to make, Hong Kong seams should be in my future!