Taylor Tacks --- How Do You Mark Your Fabric?

There are so many ways to mark fabric.  Pencils, Pens, Chalk, Tracing Paper, Soap Stone, Thread, etc.  I was taught to make taylor tacks using thread. 

Second to taylor tacks and depending on the type of fabric and application, I will sometimes use a piece of soap stone or chalk.  I've never been a big fan of using pencils, pens, or tracing paper.

In the below picture, I have made my taylor tack through four sections of fabric.  They are extra long to ensure all pieces of my fabric are still marked after pulling apart and clipping.