Bag #1 holds several bobbins wound with the threads I'll use to baste and whip stitch. I thread a needle, poke a hole through the bag (from the inside) and pull the thread through to the outside. When I cut off a length of thread I leave a tail of several inches on the outside of the bag which stays zipped closed. This bag also holds a few extra needles on a small card (sharps for basting and betweens for whip stitching the pieces together.)
I like using freezer paper templates (in this case, hexagons) which I print using a template from http://www.incompetech.com/. These shapes can be sized for a specific project. I print on regular printer paper then staple this sheet to four - six sheets of 8.5 X 11.5 inch freezer paper. I put one staple in each hexagon to hold the sheets together and cut each hexagon carefully through all layers. When I'm ready to iron them onto my fabric, I remove the staples and press the freezer paper hexagons (shiny side toward fabric) onto the fabric strips and discard the printer paper hexagons. I leave about a half inch between hexagons.
If you look closely you can see the hexagons ironed onto the fabric. I loosely fold these strips and put them into Bag #2.
Bag #3 holds small scissors and beeswax for coating the thread.
I use additional bags to hold completed units.
All these smaller bags go into a large zip lock bag which also holds my diagram, which I've colored in with colored pencils, and a small paper bag for scraps. I use masking tape to secure the scrap bag to the inside of the car door.