This 10 Minute Tip is one I have been using this past week. Instead of winding new bobbins for piecing work, just use random partial bobbins that are left over from other projects. I have been piecing a scrappy quilt and I have blue, green, pink, yellow and beige bobbin threads used throughout it. If the thread is not darker than the fabrics you are piecing, it won't shadow through, and you will be able to tidy up your bobbin container at the same time!
Now go use up some old bobbins!